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LIMIT
OP1 OP2 C
FDC-L91
F
PV HSP1 LSP1 SP2 LOCK
RESET
This Symbol calls attention to an operating procedure, practice, or the like, which, if not correctly performed or adhered to, could result in personal injury or damage to or destruction of part or all of the product and system. Do NOT proceed beyond a warning symbol until the indicated conditions are fully understood and met.
Installers
System Designer
Expert User
Read Chapter 1, 2
Read All Chapters
Read Page 12
NOTE:
Information in this user's manual is subject to change.
without notice.
This manual is applicable for L91 units with software version
1.9 and later.
Copyright a March 2006, Future Design Controls, all rights reserved. No part of this publication may be reproduced, transmitted, transcribed or stored in a retrieval system, or translated into any language in any form by any means without the written permission of Future Design Controls.
2
UM L91-Rev 8
Contents
1-1 General
1-2 Ordering Code
1-3 Programming Port
1-4 Keys and Display
Page No
5
6
7
7
1-5 Menu Overview
1-6 Limit Control Operation
12
13
1-7 Parameter Descriptions
16
Page No
3-4 PV Shift
3-5 Digital Filter
35
35
3-6 Process Alarms 36
3-7 RS-485 Communication
37
3-8 Display Mode
38
3-9 Signal Conditioner DC
Power Supply
3-10 Remote Reset
38
40
3-11 Remote Lock
3-12 Limit Annunciator
40
41
2-1 Unpacking
2-2 Mounting
2-3 Wiring Precautions
2-4 Power Wiring
2-5 Sensor Installation
Guidelines
25
2-6 Thermocouple Input
Wiring
26
2-7 RTD Input Wiring
2-8 Linear DC Input Wiring
27
28
2-9 Event Input Wiring
2-10 Output 1 Wiring
2-11 Output 2 Wiring
29
30
31
2-12 RS 485
32
2-13 Ma Retransmission
32
22
22
23
25
42
43
47
3-1 Process Input
3-2 Limit Control
3-3 Setpoint Range
33
34
34
UM L91-Rev 8
3
Page No
Figure 1-1 Programming Port Location
7
Figure 1-2 Front Panel Display
8
Figure 1-3 Power Up Sequence
10
Figure 1-4 High Limit Operation
13
Figure 1-5 Low Limit Operation
14
Figure 1-6 High/Low Limit Operation
15
Figure 2-1 Mounting Diagram
23
Figure 2-2 Lead Termination
24
Figure 2-3 Rear Terminal Connection Diagram
24
Figure 2-4 Power Supply Connections
25
Figure 2-5 Thermocouple Input Wiring
27
Figure 2-6 RTD Input Wiring
27
Figure 2-7 Linear Voltage Input Wiring
28
Figure 2-8 Linear Current Input Wiring
28
Figure 2-9 Event Input Wiring
29
Figure 2-10 Output 1 Wiring
30
Figure 2-11 Output 2 Wiring
31
Figure 2-12 RS-485 Wiring
32
Figure 3-1 Conversion of Linear Process Input --------------
33
Figure 3-2 Filter Characteristics
35
Figure 3-3 Normal Process Alarm
37
Figure 3-4 Latching Process Alarm
37
Figure 3-5 DC Power Supply Application
Figure 5-2 Cold Junction Calibration Setup
Figure 5-3 RTD Calibration
39
Figure 3-6 Remote Reset Application
40
Figure 3-7 Remote Lock Application
40
Figure 4-1 Over Temperature Protection w/ Remote Reset
42
Figure 5-1 Flow chart for Manual Calibration
44
45
46
Table 1-1 Display Form of Characters
Table 6-1 Input Characteristics
9
48
UM L91-Rev 8
4
The limit control is a microprocessor based high or low limit safety device with a latching output. The relay contacts open if an abnormal condition during the process is higher than the high limit set point or lower than the low limit set point.
Digital communication RS-485 is available as an additional option. This option allows L91 to be integrated with supervisory control system. An alarm output is another option. A variety of alarm function and alarm modes can be programmed for a specific application. The DC power supply output option is used for an external sensor or transmitter. The event input option can be programmed for remote reset or remote lock signal input.
The limit annunciator option can be used to energize an external audible alarm when limit is reached.
Ma retransmission option of Process variable or setpoint is also available.
and simple are the main features of L91.
NOTE: * Volt and Milliamp Inputs are NOT FM Approved.
5
UM L91-Rev 8
L91
1 2
3 4
4: 90 - 264 VAC, 50/60 HZ
5: 11 - 26 VAC or VDC
9: Special Order
1: Standard Input
Thermocouple: J, K, T, E, B,
R, S, N, L
RTD: PT100 DIN, PT100 JIS mV: 0~60 mV
2: Voltage: 0-1 V *
3: Voltage : 0-10 V *
4: Current: 0-20mA/4-20mA *
9: Special Order *
Example
Standard Model:
L91-4110
90-264 VAC Operation
Input: Standard Input
Output 1: Relay
Option: None
1: Form C relay rated
2A/240VAC
2: Pulsed voltage to drive SSR, 5V/30mA
6: Triac Output
1A / 240VAC,SSR
9: Special order
Option
0: None
1: Form A Relay 2A/240VAC
2: SSR Drive 5VDC @ 30 ma
6: Triac Output, 1A / 240VAC, SSR
7: Isolated 20V / 25mA DC Supply
8: Isolated 12V / 40 mA DC Supply
9: Isolated 5V / 80mA DC Supply
A: RS-485
B: Event input
C: SSR Drive 14VDC @ 40 ma
D: Retransmit 4/20, 0/20 Ma
E: Retransmit 1/5, 0/5 VDC
F: Retransmit 0/10 VDC
H: Special order
Accessories
OM94-6 = Isolated 1A / 240VAC Triac Output Module ( SSR )
OM94-7 = 14VDC/40 ma SSR Drive module
DC 94-1 = Isolated 20V / 25mA DC Output Power Supply
DC 94-2 = Isolated 12V / 40mA DC Output Power Supply
DC 94-3 = Isolated 5V / 80mA DC Output Power Supply
CM 96-1 = Isolated RS-485 Interface Module
CM 96-3 = Isolated 4/20, 0/20 MA Retransmission Output Module
CM 96-4 = Isolated 1/5, 0/5 VDC Retransmission Output Module
CM 96-5 = Isolated 0/10 VDC Retransmission Output Module
EI96-1 = Event Input Module
NOTE: * Volt and Milliamp Inputs are NOT FM Approved.
UM L91-Rev 8
6
P11A = Hand-held Programmer for L91,C91 Series Controller
SNA10A = Smart Network Adaptor for Third Party Software,
Converts 255 channels of RS-485 or RS-422 to
RS-232 Network
SNA10B = Smart Network Adaptor for FD-Net Software, Converts
255 channels of RS-485 or RS-422 to RS-232 Network
Programming Port control board
Power board
Open the housing
Top view of L91
calibration procedures only. Do not attempt to make any connection to these jumpers when the unit is on-line. Por t is for bench setup only.
SCROLL KEY
This key is used to:
1. Select a setpoint to be displayed.
2. Select a parameter to be viewed or adjusted.
3. Advance display from a parameter code to the next parameter code
7
UM L91-Rev 8
ENTER KEY 4 seconds, 8 seconds
Press the scroll key for 4 seconds the display will enter the setup menu. Press this key for 8 seconds to enter the calibration mode.
UP KEY
This key is used to increase the selected parameter value during the lock indicator is off.
DOWN KEY
This key is used to decrease the selected parameter value during the lock indicator is off.
RESET KEY
RESET
This key is used to:
1.Reset the limit condition after the process is within the limit.
2.Revert the display to the normal display.
3.Reset the latching alarm.
4.Reset the limit annunciator.
If the RESET key is left pressed, only ONE reset operation will occur. If the unit subsequently goes into a state where reset is required again, the RESET key (or remote reset contacts) must be released (opened) and pressed (closed) again.
UNLOCK KEY
RESET
4 seconds
Press the RESET key for 4 seconds to enable up/down key function, and the lock indicator led will be extinguished.
However, this function is disabled when remote lock is selected for
EIFN (Event input function).
See section 3-16 .
LIMIT
OP1 OP2 C
FDC-L91
F
PV HSP1 LSP1 SP2 LOCK
RESET
Op1: Output 1 status indicator
OP2: Output 2 status indicator
C: Degree C indicator
F: Degree F indicator
PV: Process value
HSP1: High limit set point 1
LSP1: Low limit set point 1
SP2: Set point 2 for output 2
LOCK: Lock status indicator
UM L91-Rev 8
8
A
B
C
E
F
G
I
J
K
L
N
O
P
Q
S
T
U c
D
H h
M
R
V
W
: These characters are displayed differently.
X
Y
Z
?
=
For a number with decimal point the display will be shifted one digit right:
-199.99 will be displayed as -199.9, 4553.6 will be displayed as 4553
For a number without decimal point the display will be divided into two alternating phases:
-19999 will be displayed as:
45536 will be displayed as:
-9999 will be displayed as:
During normal operation, the unit can be configured to display the process value, high limit or low limit set point ( HSP1 or LSP1 dependent on OUT1 selection ) or the word SAFE.
Whenever the process is outside the normal range, the process value will be displayed.
UM L91-Rev 8
9
If a break is detected in the sensor circuit, the display will show:
If failure is detected in the A-D converter circuit, the display will show:
10
LIMIT FDC-L91
RESET
All segments of display and indicators are left off for 0.5 second.
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
All segments of display and indicators are lit for 1 second.
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
Display program code of the product for
1 second. The left diagram shows program no.1 with version 21.
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
Display Date Code for 1 second. The left diagram shows Year 2001, Month
February (2), Date 25'th. This means that the product is produced on February
25'th, 2001. Note that the month code is for is for and C is
UM L91-Rev 8
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
Display the serial number ( 001~999 ) for 1 second.
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
LIMIT
OP1 OP2 L C
FDC-L91
L F
PV HSP1 LSP1 SP2 LOCK
RESET
Display the hours used for 2 seconds. The left diagram shows that the unit has been used for 23456.7 hours since production.
UM L91-Rev 8
11
12
Process value
High limit setpoint 1 value
Low limit setpoint 1 value
Set point 2 value
Press for 4 sec.
INPT
UNIT
HSP.H
LSP.L
LSP.H
OUT2
ADDR
BAUD
PARI
AOFN
RESO
IN.LO
IN.HI
SHIF
FILT
OUT1
O1.HY
HSP.L
Input type
Process unit
Display resolution
Low scale value for linear input
High scale value for linear input
PV shift (offset) value
PV filter time constant
Output 1 function
Output 1 hysteresis value
Lower limit of HSP1
Upper limit of HSP1
Lower limit of LSP1
Upper limit of LSP1
Output 2 function
Address for digital communication
Baud rate
Parity bit
Analog output function
Analog output low scale
Analog output high scale
AOLO
AOHI
AL.FN
AL.MD
AL.HY
AL.FT
EIFN
DISP
Alarm function
Alarm mode
Alarm hysteresis value
Alarm failure transfer
Event input function
Normal display format
PV.HI
PV.LO
Max. historical PV
Min. historical PV
T.ABN
Abnormal time
UM L91-Rev 8
Note 1.
The flow charts show a complete listing of parameters. For the actual application the number of available parameters is dependent on the setup conditions, and should be less than that shown in the flow charts.
Note
2.
Press
RESET key for 4 seconds to enable up/down key function, and the LOCK indicator led will be extinguished.
If Hi. is selected for OUT1, the unit will perform high limit control. When power is applied the OUT1 relay is de-energized. After 6.5 seconds self-test period, if the process is below the high limit set point (HSP1), the output 1 relay will be energized and OP1 indicator will go off. If the process goes above the high limit set point, the relay will be de-energized, the OP1 indicator will go on and the display will show the process value. After the process falls below the high limit set point and the RESET key is pressed or the remote reset input is applied, the relay will be energized and the OP1 indicator will go off.
NOTE: Hysteresis is safe-sided.
PV
HSP1
HSP1 O1.HY
OUT1 Relay
ON
OFF
A B C
A, B ,C=Reset is applied
O1.HY= Output1 hysteresis
13
UM L91-Rev 8
If Lo. is selected for OUT1, the unit will perform low limit control. When power is applied the OUT1 relay is de-energized. After 6.5 seconds self-test period, if the process is above the low limit set point (LSP1), the output 1 relay will be energized and OP1 indicator will go off. If the process goes below the low limit set point, the relay will be de-energized, the OP1 indicator will go on and the display will show the process value. After the process rises above the low limit set point and the RESET key is pressed or the remote reset input is applied, the relay will be energized and the OP1 indicator will go off.
NOTE: Hysteresis is safe-sided.
LSP1+O1.HY
LSP1
OUT1 Relay
ON
OFF
A B C
A, B ,C=Reset is applied
O1.HY= Output1 hysteresis
14
UM L91-Rev 8
If Hi.Lo is selected for OUT1, the unit will perform high/low limit control. When power is applied the OUT1 relay is de-energized. After 6.5 seconds self-test period, if the process is below the high limit set point (HSP1) and above the low limit set point (LSP1), the output 1 relay will be energized and OP1 indicator will go off. If the process goes above the high limit set point or below the low limit set point, the relay will be de-energized, the OP1 indicator will go on and the display will show the process value. After the process is within the normal operation range, and the RESET key is pressed or the remote reset input is applied, the relay will be energized and the
OP1 indicator will go off. NOTE: Hysteresis is safe-sided.
A B C D E F
HSP1
HSP1 O1.HY
LSP1+O1.HY
LSP1
OUT1 Relay
ON
OFF
A, B, C, D, E, F =Reset is applied
O1.HY= Output1 hysteresis
15
UM L91-Rev 8
Parameter
Notation
HSP1
LSP1
SP2
Parameter
Description
Range
High Limit Set point 1
Low Limit Set point 1
Low: HSP.L
High: HSP.H
Low: LSP.L
High: LSP.H
Set point 2 Value for
Output 2
See Table 6-1
INPT
Input Type Selection
0
1
2
3
4
5
6
7
8
9
10
: J type thermocouple
: K type thermocouple
: T type thermocouple
: E type thermocouple
: B type thermocouple
: R type thermocouple
: S type thermocouple
: N type thermocouple
: L type thermocouple
: PT100 ohms DIN curve
: PT100 ohms JIS curve
Default
Value
100.0 C
(212.0 F)
0 C
(32.0 F)
90.0 C
(194.0 F)
1
( 0 )
16
UM L91-Rev 8
Parameter
Notation
Parameter
Description
Range
INPT
Input Type Selection
11 : 4~20 mA linear current
*
12 : 0~20 mA linear current*
13 : 0~60 mV linear voltage
14 : 0~1 V linear voltage
*
15
16
17
: 0~5 V linear voltage
*
: 1~5 V linear voltage
*
: 0~10V linear voltage *
UNIT Process Unit
0
1
:
Degree C unit
:
Degree F unit
2
0
:
Process unit
:
No decimal point
1 :
1 decimal point
RESO Display Resolution
2 :
2 decimal point
IN.LO
Low Scale Value for
Linear Input
3 :
3 decimal point
Low: -19999
High: IN.HI
NOTE: Inputs 11, 12, 14, 15, 16, and 17 are NOT FM Approved.
Default
Value
1
( 0 )
0
( 1 )
1
0
17
UM L91-Rev 8
Parameter
Notation
IN.HI
Parameter
Description
High Scale Value for
Linear Input
SHIF
FILT
OUT1
PV Shift ( offset )
Value
PV Filter Time
Constant
Output 1 Function
Range
Default
Value
Low: IN.LO
High: 45536
Low: -200.0 C
(-360.0 F)
High: 200.0 C
(360.0
F)
0
1
2
3
4
5
6
7
8
9
2
3
4
: 0 second time constant
: 0.2 second time constant
: 0.5 second time constant
: 1 second time constant
: 2 seconds time constant
: 5 seconds time constant
: 10 seconds time constant
: 20 seconds time constant
: 30 seconds time constant
: 60 seconds time constant
: High limit control
: Low limit control
: High/Low limit control
100.0
0.0
2
2
18
UM L91-Rev 8
Parameter
Notation
O1.HY
HSP.L
HSP.H
LSP.L
LSP.H
OUT 2
ADDR
Parameter
Description
Output 1 Hysteresis
Value
Lower Limit of HSP1
Upper Limit of HSP1
Lower Limit of LSP1
Upper Limit of LSP1
Range
Low: 0.1
High: 10.0 BC (18.0 BF)
Low: -19999
High: HSP.H
Low: HSP.L
High: 45536
Low: -19999
High: LSP.H
Low: LSP.L
High: 45536
Output 2 Function
3
4
5
6
0
1
2
7
8
9
10
11
: No function
: DC power supply output
: RS-485
Communication
:Alarm output
: Limit annunciator
:Event input
:4-20mA analog retransmission output
:0-20mA analog retransmission output
:0-1V analog retransmission output
:0-5V analog retransmission output
:1-5V analog retransmission output
:0-10V analog retransmission output
Address Assignment of Digital COMM
Low: 1
High: 255
Default
Value
0.1
0 C
(32.0 F)
1000.0 C
(1832.0 F)
-100.0 C
(-148.0 F)
0 C
(32.0 F)
4
1
BAUD
0
Baud Rate of Digital
COMM 1
: 0.3 Kbits/s baud rate
: 0.6 Kbits/s baud rate
UM L91-Rev 8
19
Parameter
Notation
BAUD
PARI
AOFN
AOLO
AOHI
AL.FN
Parameter
Description
Parity Bit of Digital
COMM
2
3
4
Baud Rate of Digital
COMM
5
6
7
8
9
0
1
2
Range
: 1.2 Kbits/s baud rate
: 2.4 Kbits/s baud rate
: 4.8 Kbits/s baud rate
: 9.6 Kbits/s baud rate
: 14.4 Kbits/s baud rate
: 19.2 Kbits/s baud rate
: 28.8 Kbits/s baud rate
: 38.4 Kbits/s baud rate
: 8 bit even parity
: 8 bit odd parity
: 8 bit none parity
Default
Value
5
0
Analog Output
Function
Analog Output Low
Scale Value
Analog Output High
Scale Value
Alarm function
0
1
2
: Process value
: High Limit
Set point 1
: Low Limit
Set point 1
0
Low: -19999
High: 45536
Low: -19999
High: 45536
6
7
: Process value high alarm
: Process value low alarm
0 C
(32.0 F )
100.0 C
(212.0 F )
6
20
UM L91-Rev 8
Parameter
Notation
Parameter
Description
Range
Default
Value
AL.MD
AL.HY
AL.FT
EIFN
DISP
PV.HI
PV.LO
T.ABN
Alarm mode
Alarm hysteresis value
0
1
: Normal alarm action
: Latching alarm action
Low: 0.1
High: 10 BC
(18.0 BF )
Alarm failure transfer
Event input function
0
1
0
1
2
: Alarm output goes off as unit fails
: Alarm output goes on as unit fails
: No event function
: Remote reset for output 1, output 1 on.
: Remote lock for the unit
0 : Display process value
Normal display format
1 : Display
HSP1 or LSP1 value
Historical Max. value of PV
2 : Display the word SAFE
Low: -19999
High: 45536
Historical Min. value of PV
Accumulated time during abnormal condition
Low: -19999
High: 45536
Low: 0
High:6553.5 minutes
0
0.1
1
0
0
Read
Only
Read
Only
Read
Only
21
UM L91-Rev 8
Dangerous voltages capable of causing death are present in this instrument. Before installation or beginning any troubleshooting procedures the power to all equipment must be switched off and isolated. Units suspected of being faulty must disconnected and removed to a properly equipped workshop for testing and repair. Component replacement and internal must be made by a qualified maintenance person only.
To minimize the possibility of fire or shock hazards, do not expose this instrument to rain or excessive moisture.
Do not use this instrument in areas under hazardous conditions such as excessive shock, vibration, dirt, moisture, corrosive gases or oil. The ambient temperature of the areas should not exceed the maximum rating specified in Chapter 6.
Upon receipt of the shipment remove the unit from the carton and inspect the unit for shipping damage.
If any damage due to transit , report and claim with the carrier.
Write down the model number, serial number, and date code for future reference when corresponding with our ser vice center. The serial number (S/N) and date code (D/C) are labeled on the box and the housing of the unit.
Make panel cutout to dimension shown in Figure 2-1.
22
UM L91-Rev 8
I nstall both mounting clamps and insert the housing into panel cutout.
45
+0.5
_
0
45
+0.5
_
0
Panel cutout
Panel
86 mm
94 mm
*
Before wiring, verify the label for correct model number and options. Switch off the power when checking.
*
Care must be taken to ensure that maximum voltage rating specified on the label are not exceeded.
*
It is recommended that power of these units to be protected by fuses or circuit breakers rated at the minimum value possible.
*
All units should be installed inside a suitably grounded metal enclosure to prevent live parts being accessible from human hands and metal tools.
*
All wiring must conform to appropriate standards of good practice and local codes and regulations. Wiring must be suitable for maximum voltage, current, and temperature rating of the system.
*
Take care not to over-tighten the terminal screws.
UM L91-Rev 8
23
*
Unused control terminals should not be used as jumper points as they may be internally connected, causing damage to the unit.
* Verify that the ratings of the output devices and the inputs as specified in Chapter 6 are not exceeded.
*
Electric power in industrial environments contains a certain amount of noise in the form of transient voltage and spikes. This electrical noise can enter and adversely affect the operation of microprocessor-based controls. For this reason we strongly recommend the use of shielded thermocouple extension wire which connects the sensor to the unit. This wire is a twisted-pair construction with foil wrap and drain wire. The drain wire is to be attached to earth ground at the sensor end only.
3.2mm min.
7.0mm max.
24
I
B
V
_
B
A
RTD
_
5
3
4
1
2
_
LL
8
9
6
7
10
_
UM L91-Rev 8
The unit is supplied to operate at 11-26 VAC / VDC or 90-264VAC.Check
that the installation voltage corresponds with the power rating indicated on the product label before connecting power to the unit.
6
7
8
9
10
Fuse
4
5
1
2
3
90
11
~
~
264 VAC or
26 VAC / VDC
This equipment is designed for installation in an enclosure which provides adequate protection against electric shock. The enclosure must be connected to earth ground.
Local requirements regarding electrical installation should be rigidly observed. Consideration should be given to prevent from unauthorized person access to the power terminals.
Proper sensor installation can eliminate many problems in a control system. The probe should be placed so that it can detect any temperature change with minimal thermal lag. In a process that requires fairly constant heat output, the probe should be placed closed to the heater. In a process where the heat demand is variable, the probe should be closed to the work area. Some experiments with probe location are often required to find this optimum position.
25
UM L91-Rev 8
In a liquid process, addition of a stirrer will help to eliminate thermal lag. Since the thermocouple is basically a point measuring device, placing more than one thermocouple in parallel will provide an average temperature readout and produce better results in most air heated processes.
Proper sensor type is also a very important factor to obtain precise measurements. The sensor must have the correct temperature range to meet the process requirements. In special processes the sensor might need to have different requirements such as leakproof, anti-vibration, antiseptic, etc.
Standard thermocouple sensor limits of error are +/-4degrees F
(+/- 2 degrees C ) or 0.75% of sensed temperature (half that for special ) plus drift caused by improper protection or an overtemperature occurrence. This error is far greater than controller error and cannot be corrected at the sensor except by proper selection and replacement.
Thermocouple input connections are shown in Figure 2-5. The correct type of thermocouple extension lead-wire or compensating cable must be used for the entire distance between the unit and the thermocouple, ensuring that the correct polarity is observed throughout. Joints in the cable should be
If the length of thermocouple plus the extension wire is too long, it may affect the temperature measurement. A 400 ohms K type or a 500 ohms J type thermocouple lead resistance will produce approximately 1 degree C temperature error .
26
UM L91-Rev 8
+
1
2
3
4
5
6
7
8
9
10
RTD connection are shown in Figure 2-6, with the compensating lead connected to terminal 4. For two-wire RTD inputs, terminals 4 and 5 should be linked. The three-wire RTD offers the capability of lead resistance compensation provided that the three leads are of same gauge and equal length.
Two-wire RTD should be avoided, if possible, for the purpose of accuracy.
A 0.4 ohm lead resistance of a two-wire RTD will produce 1 degree C temperature error.
RTD
1
2
3
4
5
6
7
8
9
10
RTD
1
2
3
4
5
6
7
8
9
10
UM L91-Rev 8
27
DC linear voltage and linear current connections are shown in Figure 2-7 and Figure 2-8 .
3
4
5
1
2
8
9
10
6
7
Input Wiring
*
4
5
1
2
3
Input Wiring *
NOTE: Volt and Milliamp inputs are NOT FM Approved.
8
9
6
7
10
28
UM L91-Rev 8
+
2
1
3
4
5
8
9
6
7
10
3
4
5
1
2
8
9
6
7
10
The event input can accept a switch signal as well as an open collector signal. The event input function (EIFN) is activated as the switch is closed or an open collector (or a logic signal ) is pulled down.
UM L91-Rev 8
29
3
4
5
1
2
3
4
5
1
2
30
1
2
3
4
5
6
7
8
9
10
Load
8
9
6
7
10
Contactor
6
7
8
9
10
+
SSR
_
+
Load
5V
0V
33
33
10
9
+
UM L91-Rev 8
120V/240V
Supply
Max. 2A
Resistive
LOAD
3
4
5
1
2
120V/240V
Supply
LOAD
SSR
_
+
+
2
1
3
4
5
Sensor or
Transmitter
+
3
4
5
1
2
UM L91-Rev 8
6
7
8
9
10
8
9
6
7
10
8
9
6
7
10
31
TX2
1
TX1
2
3
4
5
6
7
8
9
10
RS-485
Twisted-Pair Wire
RS-485 to RS-232 network adaptor
SNA10A or
SNA10B
TX1
TX2
RS-232
PC
1
2
3
6
7
8
4 9
5
10
Max. 247 units can be linked
Output options include: Ma and VDC
-
+
MA/VDC
3
4
5
1
2
6
9
10
7
8
32
UM L91-Rev 8
Press for 4 seconds to enter setup mode. Press to select the parameter. The display will indicate the parameter symbol and the value
( or selection ) for that parameter.
most (not all) process related parameters.
If 4-20mA is selected for INPT, let SL specifies the input signal low (ie.
4mA), SH specifies the signal high (ie. 20mA), S specifies the current input signal value, the conversion cur ve of the process value is shown as follows:
process value
IN.LO
PV
IN.HI
SL S SH
input signal
33
UM L91-Rev 8
S-SL
SH-SL following setup:
INPT = 4-20 mA
UNIT = PU
RESO = 1-DP
IN.LO = 0.0
IN.HI = 15.0
Of course, you may select other value for RESO to alter the resolution.
a proper value to eliminate the relay jitter in a noisy environment.
Hidden if LO is selected for OUT1
Hidden if LO is selected for OUT1
Hidden if HI is selected for OUT1
Hidden if HI is selected for OUT1
HSP.L and HSP.H in setup menu are used to confine the adjustment range of HSP1. LSP.L and LSP.H are used to confine the adjustment range of LSP1.
34
UM L91-Rev 8
In certain application it is desirable to shift the indicated value from its actual value. This can be easily accomplished with this unit by using the PV shift function.
Cycle the unit to the SHIF parameter by using the scroll key.
The number you adjust here, either positive or negative, will
In certain applications the process value is too unstable to be read. To Improve this a programmable low pass filter incorporated in the L91 can be used. This is a first order filter with time constant specified by FILT parameter which is contained in setup menu. The
FILT is defaulted to 0.5 sec. before shipping. Adjust FILT to change the time constant from 0 to 60 seconds. 0 second represents no filter is applied to the input signal. The filter is characterized by the following diagram.
PV
1sec
FILT=0
FILT=1
FILT=30
1sec
Time
35
UM L91-Rev 8
The output 2 will per form process alarm function by selecting
ALM for OUT2 and PV.H.A or PV.L.A for AL.FN. If PV.H.A is selected the alarm will per form process high alarm. If PV.L.A
is selected the alarm will per form process low alarm. The process alarm sets an absolute trigger level. When the process exceeds that absolute trigger level an alarm occurs.
The trigger level is determined by SP2 (Set point 2 value) and
AL.HY (Alarm hysteresis value). The hysteresis value is introduced to avoid inter ference action of alarm in a noisy environment. Normally AL.HY can be set with a minimum value(0.1).
Trigger levels for process high alarm are SP2 and SP2 AL.HY.
Trigger level for process low alarm are SP2+AL.HY and Sp2.
There are two types of alarm mode can be selected, these are: normal alarm and latching alarm.
When a normal alarm is selected, the alarm output is deenergized in the non-alarm condition and energized in an alarm condition.
If a latching alarm is selected, once the alarm output is energized, it will remain unchanged even if the alarm condition has been cleared unless the power is shut off or the RESET key (or remote reset button) is pressed.
In case of Sensor Break or A-D Failure occurs, the alarm output will be on or off according to the selection of AL.FT.
Examples:
SP2 = 200
AL.MD = NORM
AL.HY = 10.0
AL.FN = PV.H.A
36
UM L91-Rev 8
Examples:
200
190
200
190
ON
200
190
200
190
OFF
200
190
200
190
200
190
ON 200
190
200
190
200
190
Using a PC for data communication is the most economic way.
The signal is transmitted and received through the PC communication Port (generally RS-232). Since a standard PC can't support RS-485 port, a network adaptor (such as SNA10A, SNA10B) has to be used to convert RS-485 to RS-232 for a PC if RS-485 is required for the data communication. Many RS-485 units (up to
247 units) can be connected to one RS-232, that is a PC with 4 comm ports can communicate with 988 units.
37
UM L91-Rev 8
Select COMM for OUT2 in setup menu, the output 2 will perform
RS-485 interface with protocol.
Setup
1. Select COMM for OUT2
2. Set an unequal address (ADDR) for those units which are connected to the same port.
3. Set the Baud Rate (BAUD) and Parity Bit (PARI) such that these values are accordant with PC setup conditions.
The DISP in the setup menu is used to select the display format for the normal condition. If PV is selected, the display will indicate the process value. If SP1 is selected, the display will indicate HSP1 value for high limit control (OUT1= HI) and high/low limit control (OUT1= HI.LO) or indicate LSP1 value for low limit control(OUT1=LO). IF SAFE is selected, the display will indicate the word SAFE for the normal condition.
However the display will indicate the process value if the process value goes beyond high limit or low limit. If an error condition occurs, the display will indicate the error symbol.
The SAFE display will return when the process has returned to within SAFE values. Depressing reset key will reset output relay.
Three types of isolated DC power supply are available to supply an external transmitter or sensor. These are 20V rated at 25mA, 12V rated at 40 mA and 5V rated at 80 mA. The DC voltage is delivered to the output 2 terminals by selecting
DCPS for OUT2 in setup menu.
38
UM L91-Rev 8
+
4-20mA
+
2
3
1
4
5
COM
IN
OUT
V or mA
+
2
3
+
4
5
1
6
7
8
9
10
6
7
8
9
10
DC Power Supply
+
2
1
3
+
4
5
6
7
8
9
10
Don't use the DC power supply beyond its rating current to avoid damage.
Purchase a correct voltage to suit your external devices. See ordering code in section 1-2.
39
UM L91-Rev 8
If EIFN is selected for OUT2 and REST is selected for EIFN, terminals
1 & 2 will act as remote reset input. Pressing remote reset button will perform the same function as pressing the RESET key. Refer to for RESET key function.
Remote
Reset
3
4
5
1
2
8
9
10
6
7
Setup
If EIFN is selected for OUT2 and LOCK is selected for EIFN, terminals
1 & 2 will act as remote lock input. Turning the remote lock switch on will keep all the parameter setting from been changed.
Remote
Lock
3
4
5
1
2
6
Setup
9
10
7
8
40
UM L91-Rev 8
If L_AN (Limit annunciator) is selected for OUT2, the output 2 will act as a
Limit Annunciator. If the limit is or has been reached and the RESET key
(or remote reset contacts)has not been pressed since the limit was reached, then the limit annunciator output will be energized and the
OP2 indicator will be lit and remain unchanged until the RESET key or remote reset input is applied.
There are three reference data contained in setup menu. The reference data are read only data. The maximum historical PV, displayed by ,which shows the maximum process value since the last UNLOCK operation. The minimum historical PV, displayed by , which shows the minimum process value since the last UNLOCK operation. The abnormal time, displayed by ,which shows the total accumulated time (minutes) during the process has been in abnormal condition since the last
UNLOCK operation.
The values of reference data will be initiated as soon as the RESET key is pressed for 4 seconds (UNLOCK operation). After UNLOCK operation, the PV.HI and PV.LO values will start from the current process value and T.ABN value will start from zero.
UM L91-Rev 8
41
42
Temperature
Control
3
4
5
1
2
8
9
6
7
10
_
+
Rear View
Reset
Button
1
Limit Control
2
3
4
5
L91
Rear View
8
9
6
7
10
Mechanical
Contactor
Heater
L N
UM L91-Rev 8
Do not proceed through this section unless there is a definite need to re-calibrate the controller. Otherwise, all previous calibration data will be lost. Do not attempt re-calibration unless you have appropriate calibration equipment. If calibration data is lost, you will need to return the unit to your supplier who may change you a service fee to re-calibrate the unit.
Entering calibration mode will break the control loop. Make sure that if the system is allowable to apply calibration mode.
Equipment needed for calibration:
(1) A high accuracy calibrator (Fluke 5520A Calibrator recommended) with following function:
0-100mA millivolt source with +/-0.005% accuracy
0-10V voltage source with +/-0.005% accuracy
0-20mA current source with +/-0.005% accuracy
0-300 ohm resistant source with +/-0.005% accuracy
(2) A test chamber providing 25 C - 50 C temperature range
(3) A switching network (SCANNER 80, optional for automatic calibration)
(4) A calibration fixture equipped with programming units
(optional for automatic calibration)
(5) A PC with calibration software FD-Net and Smart Network
Adaptor SNA10B (optional for automatic calibration)
Since each unit needs 30 minutes to warm up before calibration.
The calibration procedures described in the following are a step by
Apply Enter Key (press calibration mode. see for 8 seconds) to enter the
.
43
UM L91-Rev 8
RESET
RESET
Normal Mode
4 seconds
Setup Mode
4 seconds
Ad0
Step 1
4 seconds
RESET
RESET
RESET
RESET
ADG
CJTL
CJG
REF
Step 2
4 seconds
Step 3
4 seconds
Step 4
4 seconds
Step 5
4 seconds
RESET
SR
Step 6
4 seconds
Step1: Calibrate Zero of A to D converter.
Short terminal 4 and 5, then press for at least 4 seconds.
The display will blink a moment. If the display didn't blink, then the calibration has failed.
44
UM L91-Rev 8
Step 2: Calibrate Gain of A to D converter.
Send a span signal to terminal 4 and 5 with correct polarity.
The span signal is 60 mV for thermocouple input, 1V for
0-1V input, 10V for 0-10V input and 20mA for 0-20 mA input.
Press for at least 4 seconds. The display will blink a moment. If the display didn't blink, then the calibration failed.
Step 3: Calibrate offset of cold junction .
Setup the equipment according to the following diagram for calibrating the cold junction compensation. Note that a
K type thermocouple must be used.
Calibrator
K-TC
K+
4
L 9 1
5
K
Stay at least 20 minutes in stillair room room temperature
25 +/- 3 C
The L91 being calibrated for Cold Junction Compensation MUST be programmed for K t/c input, Celsius display
prior
to performing the CJTL calibration.
Set the calibrator to be configured as K type thermocouple output. Calibrator must have an internal compensation.
Send a 0.00 C signal to the unit under calibration.
With CJTL on the display adjust the value to 0.00 reading.
Once adjusted, Press for at least 4 seconds. The display will blink a moment. If the display didn't blink, then the calibration failed.
45
UM L91-Rev 8
Step 4: Calibrate gain of cold junction .
Setup the equipment same as step 3.
The L91 being calibrated for Cold Junction Compensation MUST be programmed for K t/c input, Celsius display
prior
to performing the CJG calibration.
Set the calibrator to be configured as K type thermocouple output. Calibrator must have an internal compensation.
Send a 0.00 C signal to the unit under calibration.
With CJG on the display adjust the value to 0.00 reading.
Once adjusted, Press for at least 4 seconds. The display will blink a moment. If the display didn't blink, then the calibration failed.
Step 5: Calibrate RTD reference voltage .
Send a 100 ohms signal to terminal 3, 4 and 5 according to
.
100 ohms
3
4
5
1
2
8
9
6
7
10
Press for at least 4 seconds. The display will blink a moment. If the display didn't blink, then the calibration failed.
Step 6: Calibrate RTD serial resistance .
Change the ohm's value of the calibrator to 300 ohms. Press for at least 4 seconds. The display will blink a moment.
If the display didn't blink, then the calibration failed.
46
UM L91-Rev 8
90-264 VAC, 49-63 Hz, 10 VA, 5W maximum
11-26 VAC/VDC, 10 VA, 5W maximum
18 bits
5 times/second
-2 VDC minimum, 12 VDC maximum
(1 minute for mA input)
A1.5 uV / C
T/C: 0.2 uV/ohm
3-wire RTD: 2.6 C/ohm of resistance difference of two leads
2 -wire RTD: 2.6 C/ohm of resistance sum of two leads
200nA
120db
Sensor open for TC, RTD and mV inputs, below 1 mA for 4-20 mA input, below 0.25V for 1-5 V input, unavailable for other inputs.
Within 4 seconds for TC, RTD and mA inputs,
0.1 second for 4-20 mA and 1-5V inputs.
Interface : RS-485 ( up to 247 units )
Protocol : Modbus Protocol RTU mode
Address : 1 - 247
Baud Rate : 0.3 ~ 38.4 Kbits/sec
Data Bits : 8 bits
Parity Bit : None, Even or Odd
Stop Bit : 1 or 2 bits
Communication Buffer : 50 bytes
47
C h a r a c t e r i s t i c s :
K
T
E
Type
J
Range
( -184 F 1832 F )
-200 C 1370 C
( -328 F 2498 F )
-250 C 400 C
( -418 F 752 F )
-100 C 900 C
( -148 F 1652 F )
B
0 C 1820 C
( - 32 F 3308 F )
R
S
N
L mV mA
V
0 C 1767.8 C
( - 32 F 3214 F )
0 C 1767.8 C
( - 32 F 3214 F )
-250 C 1300 C
( -418 F 2372 F )
-200 C 900 C
( -328 F 1652 F )
-210 C 700 C
( -346 F 1292 F )
-200 C 600 C
( -328 F 1112 F )
-8mV 70mV
-3mA 27mA
-1.3V
11.5V
48
UM L91-Rev 8
100
-10V minimum, 0.8V maximum.
2V minimum, 10V maximum.
Remote reset, remote lockout.
2A/240 VAC, life cycles 200,000 for resistive load.
Source Voltage 5V, current limiting resistance
66 ohms.
1/240 VAC
20A for 1 cycle
50 mA rms
3 mA rms
1.5 V rms
1000 Mohms min. at 500 VDC
2500 VAC for 1 minute
Ripple
Voltage
20 V +/-0.5 V 25 mA
0.2 Vp-p
500 VAC
12 V +/-0.3 V 40 mA
0.1 Vp-p
5 V +/-0.15 V 80 mA
0.05 Vp-p
Analog Retransmission
Functions: Process Variable
Output Signal: 4-20 mA, 0-20 mA, 0 - 5V, 1 - 5V, 0 - 10V
Resolution : 15 bits
Accuracy : +/-0.05 % of span +/-0.0025 %/ C
Load Resistance : 0 - 500 ohms ( for current output )
10 K ohms minimum ( for voltage output )
Regulation: 0.01 % for full load change
Settling Time: 0.1 sec. (stable to 99.9 % )
Breakdown Volts: 1000 VAC min.
Linearity Error : +/-0.005 % of span
Temp Effect: +/-0.0025 % of span / C
Saturation Low : 0 mA ( or 0V )
Saturation High : 22.2 mA ( or 5.55V, 11.1V min. )
Output Range :0-22.2mA(0-20mA or 4-20mA)
0-5.55V ( 0 - 5V, 1 - 5V )
0 - 11.1 V ( 0 - 10V )
49
4 keys
0.4" (10mm),
For automatic setup, calibration and testing.
Connection to PC for supervisory control.
programmable
First order
0, 0.2, 0.5, 1, 2, 5, 10, 20, 30, 60 seconds programmable
2
2
50
EMC EN61326
UM L91-Rev 8
Warranty and Return Statement:
Warranty:
Future Design Controls products described in this brochure are warranted to be free from functional defects in material and workmanship at the time the products leave Future Design Controls facilities and to conform at that time to the specifications set forth in the relevant Future Design Controls manual, sheet or sheets for a period of TWO years after delivery to the first purchaser.
There are no expressed or implied Warranties extending beyond the Warranties herein and above set forth.
Limitations:
Future Design Controls provides no warranty or representations of any sort regarding the fitness of use or application of its products by the purchaser. Users are responsible for the selection, suitability of the products for their application or use of Future Design Controls products.
Future Design Controls shall not be liable for any damages or losses, whether direct, indirect, incidental, special, consequential or any other damages, costs or expenses excepting only the cost or expense of repair or replacement of Future Design Control products as described below.
Future Design Controls sole responsibility under the warranty, at
Future Design Controls option, is limited to replacement or repair, free of charge, or refund or purchase price within the warranty period specified. This warranty does not apply to damage resulting from transportation, alteration, misuse or abuse.
Future Design Controls reserves the right to make changes without notification to purchaser to materials or processing that do not effect compliance with any applicable specifications.
Return Material Authorization:
Contact Future Design Controls for Return Material Authorization prior to returning any product to our facility.
30
Future Design Controls, Inc.
7524 West 98th Place, PO Box 1196,Bridgeview, IL 60455
888.751.5444 - Main Office
888.307.8014 - Fax
866.342.5332 - Technical Suport
Website [email protected]
www.futuredesigncontrols.com
UM L91-Rev 8
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