null  User manual
Timer/Counter/Tachometer
User Manual
CTA USER MANUAL
FORWORD
This user manual provides handy instructions for the operation of Delta CTA series. The detailed
operational instructions help the user to easily locate the functions they would like to acquire. In addition,
this user manual also helps sales and engineering staff to understand more about the advantages of Delta
CTA series and assist the users to operate CTA as well as getting familiar with its functions. The date of the
latest update is shown in the bottom left of the page.
CHAPTER ONE:
BASIC INSTRUCTIONS
1.1
Features
4
1.2
Ordering Information
4
1.3
Specifications
4
1.4
Display, Indicators & Keys
5
1.5
Dimensions
5
1.6
Terminals Definition
5
1.7
Default Settings
7
1.8
Easy DIP Switch Setup
7
CHAPTER TWO: FUNCTIONS
2.1
Ti m e r
9
2.2
Counter
14
2.3
Tachometer
19
2.4
Timer + Counter (Mixed Mode)
22
CHAPTER THREE:
3.1
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APPLICATIONS
On Cut-To-Length Machine
23
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
NOTES
How to use CTA correctly…
ƒ To avoid misaction caused by interference, please make sure if you isolate the I/O wiring when I/O
wiring and power cable or high-voltage cable in the same wiring tube. If possible, use a separate tube
for the I/O wiring.
ƒ Make sure that you place the sensor, other input devices, signal cables and CTA away from the
interference source.
ƒ It will require 200ms after CTA is switched on for the activation of the internal power and default
value reset. CTA may not operate normally during this period of time.
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
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2007-05-09
CTA USER MANUAL
CHAPTER ONE:
BASIC INSTRUCTIONS
1.1 Features
Delta CTA series is the 3-in-1 timer, counter and tachometer with the following features:
„
Can be a timer, counter, or tachometer and can operate in timer + counter mixed mode.
„
Offers voltage input (PNP) or non-voltage input (NPN).
„
The Pre-Scale function allows the input pulses to be displayed in their actual units.
„
Counting speeds available: 1/30/200/1K/5K/10K cps. Maximum: 10K cps.
„
The counting can be conducted in millisecond, second, minute, minute/second and
hour/minute/second.
„
Output 1 contains relay output and transistor output. The two types of outputs can be enabled
concurrently.
„
Offers total counting and batch counting.
„
“Reset” and “Lock” keys for more convenient use.
„
Offers 6-digit double-line LCD display.
„
Offers easy DIP switch setup.
„
Decimal point setup available.
1.2 Ordering Information
There are currently two model types available: CTA4000A and CTA4100A, only differentiating in the
type of output 2.
CTA4 □00A
1
2
3
4
5
CTA: Delta Timer/Counter/Tachometer A series
n Panel size
4: 48mm × 48mm
o Output 2
0: Transistor
p Preset stage
0: 2 preset stage
q Communication
0: None
\ Power supply
A: AC100 ~ 240V
1: Relay
1.3 Specifications
Power input
Input voltage range
Power consumption
External power supply
Display
Input signal
Output 1
Output 2
Dielectric strength
Vibration resistance
Shock resistance
Ambient temperature
Storage temperature
Altitude
Ambient humidity
Pollution degree
2007-05-09
AC100 ~ 240V, 50/60Hz
85% to 110%, rated voltage
Less than 10VA
12Vdc ±10%, 100mA
Double-line, 6-digit LCD display
Non-voltage input (NPN): ON impedance 1K ohm max. ON residual voltage: 2V max.
Voltage input (PNP): High level: 4.5 to 30Vdc, Low level: 0 to 2Vdc
Relay: SPST max.250Vac, 5A (resistance load)
Transistor: NPN open collector. When 100mA /30Vdc, residual voltage = 1.5Vdc max.
Relay: SPDT max.250Vac, 5A (resistance load)
Transistor: NPN open collector. When 100mA /30Vdc, residual voltage = 1.5Vdc max.
2000Vac 50/60 Hz for 1 minute
Without damage: 10 ~ 55Hz, amplitude = 0.75mm, 3 axes for 2 hours
Without damage: drop 4 times, 300m/s2, 3 edges, 6 surfaces and 1 corner
0°C to +50°C
-20°C to +65°C
2000m or less
35% to 85% RH (non-condensing)
Degree 2
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
1.4 Display, Indicators & Keys
Reset 2 indicator
Reset 1 indicator
PV(Present Value) display
Key protect 2 indicator
Key protect 1 indicator
SV(Set Value) display
Output 2 indicator
Output 1 indicator
Timer function indicator
Counter function indicator
Tachometer function indicator
Special function indicator
Lock key
Reset key
Up/Down key
Mode and number shift key
PV: Red LCD
SV and other display areas: Green LCD
H M S: Time unit for the timer
TOTAL: Total counting value
BATCH: Batch counting value
SET1 2: SV1 and SV2
1.5 Dimensions
1.6 Terminal Definition
CTA combines the functions of timer, counter and tachometer; therefore, the definitions of input
terminals in different modes are slightly different. CTA has 4 terminals ready for inputs. Take the pins
in counter mode for example, 12 13 7 8 are for CP1 (A phase), CP2 (B phase) RST1 and RST2 inputs
(see figure 1).
The output terminals are for OUT1 and OUT2. OUT1 has two outputs, transistor output and relay
output, and the two outputs operate concurrently. The type of OUT2 is determined by the model
name. For CTA4000A, OUT2 only offers transistor output with inductive load protection diode (see
figure 2). For CTA4100A, OUT2 only offers relay output (see figure 3).
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
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2007-05-09
CTA USER MANUAL
CTA4 series
Counter
CP1
CP2
Reset1
Reset2
Timer
Gate
Reset1
Start
Tachometer
CP1
Reset1
Timer + Counter
CP1
Gate
Reset1
Start
Figure 1
Figure 2
Figure 3
Input connection:
NPN
PNP
Output load PIN connection:
1. When CP1, CP2, RST1 and RST2 inputs are contact inputs, please set the input type as NPN.
2. When the previous device is an open collector type, the device can adopt the 12V power supply
offered by CTA for the connection.
(Relay Output)
2007-05-09
(Transistor Output)
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
1.7 Default Settings
Tachometer
Function
Preset setting
Select function
Timer
Timer mode
Up (counting up)
Output mode
Sond1
Displayed unit
S 001 (0.01)
Pulse width of output 1 0.02sec
Min. width of reset
20ms
signal
Input signal type
NPN
Select function
Counter
Counter mode
Stage1 (1 stage)
Input mode
Up (counting up)
Output mode
F
Counting speed
5K
Position of decimal
0 (no decimals)
point
Pre-scale value
1.000
Save data while
Clear
switching off power
Min. width of reset
20ms
signal
Input signal type
NPN
Timer + Counter
Counter
Timer
There are 4 operation modes in CTA: timer, counter, tachometer and timer + counter. The table below
offers the preset parameters for all functions.
Function
Select function
Output mode
Counting speed
Position of decimal point
Pre-scale value
Delay time while switching
on power
Average of input data
Min. width of reset signal
Input signal type
Select function
Input mode of timer
Output mode of timer
Preset setting
Tachometer
2Lo1Lo
5K
0 (no decimals)
1.000 (default)
0 (function disabled)
20ms
NPN
Mix(Timer +Counter)
Up (counting up)
Sond1
Displayed unit of timer
S 001(0.01)
Input mode of counter
Up (counting up)
Output mode of counter
F
Counting speed
5K
Pulse width of output 1
Position of decimal point
Pre-scale value
Save data while switching
off power
Min. width of reset signal
Input signal type
0.02sec
0 (no decimals)
1.000 (default)
0.0 (no delay)
Clear
20ms
NPN
1.8 Easy DIP Switch Setup
The tables below are the DIP switches for each mode of CTA. Please be noted that in the “timer +
counter” mode, setting up parameters by DIP switches are not allowed.
ƒ Timer
Switch
Function
1
DIP switch
2
3
4
5
6
7
8
Timer mode
Output mode
Displayed unit
Width of reset signal
OFF
ON
Disabled Enabled
Counting Counting
up
down
See top-right
table
See bottom-right
table
20ms
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
1ms
Switch 3
OFF
ON
OFF
ON
Switch 5
OFF
ON
OFF
ON
OFF
ON
OFF
ON
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Switch 4
OFF
OFF
ON
ON
Switch 6
OFF
OFF
ON
ON
OFF
OFF
ON
ON
Output mode
Sond1
Sond2
Soffd
Son
Switch 7
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Displayed unit
0.01 sec.
0.1 sec.
1 sec.
min., 0.01 sec.
min., 0.1 sec.
0.1 min.
minute
hr., min., sec.
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CTA USER MANUAL
ƒ Counter
Switch
Function
1
DIP switch
2
3
4
5
6
7
8
OFF
ON
Disabled Enabled
Counting Counting
Counting mode
up
down
See the table on
Output mode
the right
Counting speed
30cps 10Kcps
Reserved
Input signal
NPN
PNP
Width of reset signal 20ms
1ms
Switch 3
OFF
ON
OFF
ON
Switch 4
OFF
OFF
ON
ON
Output mode
F
N
C
R
Switch 3
OFF
ON
OFF
ON
Switch 4
OFF
OFF
ON
ON
Output mode
Lo-Lo
Lo-Hi
Hi-Lo
Hi-Hi
ƒ Tachometer
Switch
1
2
3
4
5
6
7
8
Function
DIP switch
Reserved
OFF
ON
Disabled Enabled
See the table on
Output mode
the right
Counting speed
30Hz
10KHz
Reserved
Input signal
NPN
PNP
Width of reset signal 20ms
1ms
※When Switch 1 is enabled (ON), the parameters can only be set up by Switch 1 ~ Switch 8 and cannot
be modified in the system. If the parameters have to be set in the system, please disable Switch 1
(OFF).
2007-05-09
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
CHAPTER TWO:
FUNCTIONS
2.1 Timer
There are counting up and counting down modes in the timer.
2.1.1 Setting up the counting unit
sec.
sec.
sec.
min., sec.
min., sec.
min.
min.
hr., min.,
sec.
0.01 ~ 9,999.99
0.1 ~ 99,999.9
1 ~ 999,999
0.01 ~ 9,959.99
0.1 ~ 99,959.9
0.1 ~ 99,999.9
1 ~ 999,999
A unit = 10ms
A unit = 0.1 sec.
A unit = 1 sec.
A unit = 0.01 sec.
A unit = 0.1 sec.
A unit = 0.1 min.
A unit = 1 min.
Max. counting = 9,999.99 secs.
Max. counting = 99,999.9 secs.
Max. counting = 999,999 secs.
Max. counting = 5,999.99 secs.
Max. counting = 59,999.9 secs.
Max. counting = 99,999.9 mins.
Max. counting = 999,999 mins.
1 ~ 995,959
A unit = 1 sec.
Max. counting = 359,999 secs. (100 hrs.)
hr., min.
1 ~ 999,959
A unit = 1 min.
hr.
1 ~ 999,999
A unit = 1 hr.
Max. counting = 35,999,999 secs. (10,000
hrs.)
Max. counting = 699,999 hrs.
2.1.2 Setting up the parameters in the timer
To enter the page for parameter setting of the timer, press
in the main menu for more than 3
for more than 3 seconds under any of the parameter
seconds. After the setup is completed, press
page you are in and return to the main menu.
x
x
x
x
z Select functions: There are 4 modes in CTA, (left to right) timer, counter, tachometer and timer + counter.
x
x
z Select timer mode: counting up and counting down
x
x
x
x
x
x
x
x
x
x
x
x
Select output modes: There are 12 output modes in the timer. The user can choose the mode that best meets
z
the demand. See 2.1.3 for more details.
x
x
z
x
x
x
x
x
x
Select display unit: the min. unit 10ms ~ the max. unit hour are selectable
x
z
x
x
x
Select pulse width of output 1: The default output time is 0.02 second. When the parameter is set to 0.00
second, the output status will continue.
x
x
z Select min. width of reset signal: The default value is 20ms; can be set to 1ms.
x
x
z Select input signal types: NPN and PNP
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2007-05-09
CTA USER MANUAL
2.1.3 Setting up output mode of the timer
There are 12 modes in the timer for different control demands from the user. The default output time
of the 12 modes is 0.02 second. If you wish the system to keep the operation of the output, please set
the output time to 0.00 second.
Power signal
Start signal
Signal On Delay 1 (Sond1)
Pause signal
The start signal is in rising-edge trigger mode
and starts to time after the rising edge is
triggered until the set time for output. During
the execution of clear signal, the timer is reset
and waits for the start signal to restart the
timing.
Clear signal
t
Output signal
t
SV
Up
0
SV
Down
0
Signal On Delay 1
Power signal
Start signal
Signal On Delay 2 (Sond2)
Pause signal
Clear signal
Output signal
t
t
SV
Up
0
SV
Down
The start signal starts to time when enabled (Hi)
until the set time for output. During the
execution of clear signal and start signal being
disabled (Lo), the timer is reset and waits for
the start signal to restart the timing.
0
Signal On Delay 2
Power signal
Start signal
Signal Off Delay (Soffd)
Pause signal
The output starts when the start signal is at
rising-edge trigger. When the start signal is at
falling edge, the timer will start to time until
the set time for disabling the output. If the
clear signal is enabled (Hi) when the start
signal is at rising edge, the output will stop
immediately.
Clear signal
Output signal
SV
Up
0
SV
Down
0
Signal Off Delay
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CTA USER MANUAL
Power signal
Signal On (Son)
Start signal
The start signal starts to time and output when
the rising edge is triggered and the clear signal
is not executed. When the set time is reached,
the timer will return to the default value and
the output will be disabled.
Pause signal
Clear signal
Output signal
SV
Up
If clear signal is received during the execution
of the timer, the timer will return to the
default value and the output will stop.
0
SV
Down
0
Signal On
Power signal
Power On Delay (Pond)
Start signal
CTA immediately starts to time after the power
is switched on. During the timing, the start
signal and pause signal are able to stop the
timing. When the set time is reached, the
output will be enabled and the timing will stop.
Pause signal
Clear signal
t
Output signal
t
t
SV
Up
When the clear signal is executed, the timing
will be reset until the execution of clear signal
is completed and the timing will start again.
0
SV
Down
0
Power On Delay
Power signal
Start signal
Power On Delay Hond (PondH)
Pause signal
Clear signal
Output signal
t
t
SV
Up
Down
0
t
t
Same as “Pond”
The only difference is whether the current
value is held when the power is switched off. In
PondH, After the power is switched on, the
timer will resume the timing.
SV
0
Power On Delay Hold
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2007-05-09
CTA USER MANUAL
Power signal
Power signal
Start signal
Start signal
Pause signal
Pause signal
Clear signal
Clear signal
Output signal
Output signal
t
t
t
Repeat Cycle
timer output not set as 0
SV
SV
Up
Up
0
SV
SV
Down
Down
0
Repeat Cycle
timer output set as 0
Repeat Cycle (RCY)
Output in cycle.
When the output time is selected as 0 (left: continuous output), the output of the first timing cycle will
not be executed. When the set time is reached, the timing will be reset and restarted and the output will
be enabled until the next cycle.
When the output time is not 0 (right), the output time will be different from when the output time is 0.
Power signal
Power signal
Start signal
Start signal
Pause signal
Pause signal
Clear signal
Clear signal
Output signal
Output signal
t
SV
t
SV
Up
Up
0
Down
t
0
SV
SV
Down
0
0
Repeat Cycle Hold
RCYH timer output not set as 0
Timer output set as 0
Repeat Cycle Hold (RCYH)
Same as “RCY”
The only difference is whether the current value is held when the power is switched off. In RCYH, After
the power is switched on, the timer will resume the timing.
2007-05-09
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
Power signal
Repeat Cycle2 (RCY2)
Start signal
Output in cycle.
Pause signal
The start signal starts to time and output when
the rising edge is triggered and the clear signal
is not executed. When the set time SV2 is
reached, the output will be disabled and the
timer continue to time until the set time SV1 is
reached and the timer will start the timing
again.
Clear signal
Output signal
SV1
SV2
Up
0
Down
SV1
SV2
0
Repeat Cycle 2
Power signal
Start signal
Signal Cumulate (SCON)
Pause signal
Latched cumulate timer.
When the start signal is enabled (Hi), the timing
will start until the set time is reached for
output. During the execution of clear signal, the
timer is reset and waits for the start signal to be
enabled (Hi) again. CTA will resume the timing.
Clear signal
Output signal
SV
Up
Down
0
SV
0
Signal Cumulate
Power signal
Signal Twin ON-Start (STON)
Start signal
Output in cycle.
Pause signal
Clear signal
The start signal starts to time and output when
the rising edge is triggered and the clear signal
is not executed. When the set time SV2 is
reached, the output will be disabled and the
timer will restart the timing from 0 until it
reaches the set time SV1 and turn Off.
Output signal
SV1
Up
SV2
Down
SV1
SV2
0
0
Signal Twin ON-Start
Power signal
Signal Twin Off-Start (STOFF)
Start signal
Output in cycle.
Pause signal
The start signal starts to time when the rising
edge is triggered and the clear signal is not
executed. When the set time SV1 is reached,
the output will be On and the timer will restart
the timing from 0 until it reaches the set time
SV2. The timer will then start the timing again
and disable the output.
Clear signal
Output signal
Up
SV1
SV2
0
SV1
Down SV2
0
Signal Twin OFF-Start
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2007-05-09
CTA USER MANUAL
2.2 Counter
The counter functions include: 1-stage counting, 2-stage counting, batch counting, total counting and
dual counting.
1-stage counting
2-stage counting
Batch counting
Total counting
Dual counting
Only 1 SV is allowed.
2 SVs and 2 PVs are allowed.
When the PV equals SV, output 2 will be enabled and the batch PV will plus 1. This
will repeat until the batch PV reaches batch SV and output 1 will be enabled.
There is only one SV in total counting. When the PV equals SV, the output will be
enabled. The clear signal will then be enabled, and the counting will restart and
PV will be accumulated into the total counter.
For addition and subtraction of CP1 and CP2.
2.2.1 Setting up the parameters in the counter
To enter the page for parameter setting of the counter, press
in the main menu for more than 3
for more than 3 seconds under any of the parameter
seconds. After the setup is completed, press
page you are in and return to the main menu.
x
x
z
x
z
x
x
x
x
x
x
Select input modes: counting up, counting down, command counting up/down, individual counting up/down,
quadrature input
x
x
x
x
x
x
x
x
x
x
x
x
Select output modes: CTA offer 11 output modes, among which mode S, T and D are only valid with input
modes Ud_A, Ud_b and Ud_C. See 2.2.2 for more details.
x
z
x
Select counter functions: 1-stage counting, 2-stage counting, batch counting, total counting, dual counting.
x
z
x
Select functions: There are 4 modes in CTA, (left to right) timer, counter, tachometer and timer + counter.
x
z
x
x
x
x
x
x
Select counting speed: Maximum 10Kcps; others 5K, 1K, 200, 30 and 1cps.
x
x
z
Pulse width of output 1: The default output time is 0.02 second. When the parameter is set to 0.00 second,
the output status will continue.
z
Pulse width of output 2: This parameter is adjustable according to different output modes selected. If the
output mode is C, the default output time will be 0.02 second. When the parameter is set to 0.00 second,
the output status will continue.
x
x
z
x
x
x
x
Set up the position of decimal point: 0 (no decimal point), 1 (one digit after decimal point), 2 (two digits
after decimal point), 3 (three digits after decimal point)
x
z
Set up pre-scale value: 1.000 (default 1:1) Range: 0.001 ~ 99.999
x
z
Save the data while switching off the power: When SAVE is selected, the PV will be saved; when CLEAR is
selected, the PV will not be saved.
x
z
x
x
Set up minimum width of reset signal: Default = 20ms; 1ms is also selectable.
x
x
Select input signal types: NPN and PNP
z
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2007-05-09
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
2.2.2 Setting up input mode of the counter
CTA offers 5 counting modes: counting up, counting down, command counting up/down, individual counting
up/down and quadrature input.
The minimum signal width of the counting speed:
Counting speed
1cps
30cps
1Kcps
5Kcps
10Kcps
Minimum signal width
500ms
16.7ms
0.5ms
0.1ms
0.05ms
Counting up
CP1: Counter input
H
CP1 L
CP2: Counter input prohibited
A
CP2 H
L
Prohibit
A
CP1: Counter input prohibited
H
CP1 L
A
CP2: Counter input
A
Prohibit
H
CP2 L
5
4
Present
Value
3
Present
Value
2
3
2
1
4
1
0
0
Note: A has to be larger than width of min. Input signal
0
0
Note: A has to be larger than width of min. Input signal
Counting down
CP1: Counter input
CP1 H
L
CP2 H
L n
CP2: Counter input prohibited
A
Prohibit
A
A
CP2 H
L
Prohibit
CP2: Counter input
A
n
n-1
n-1
Present
Value
CP1: Counter input prohibited
CP1 H
L
Present
Value
n-2
n-3
n-4
0
Note: A has to be larger than width of min. Input signal
Command counting up/down
n-2
n-3
n-4
n-5
0
Note: A has to be larger than width of min. Input signal
CTA USER MANUAL
Individual counting up/down
Quadrature input
CP1
H
L
B
B
B
B
CP2 H
L
3
Present
Value
2
2
1
1
0
0
Note:
0
has to be larger than width of 1/2 min. input signal.
B
2.2.3 Setting up output mode of the counter
CTA offers 11 output modes in the counter for 1-stage and 2-stage counting. When 1-stage output is selected,
output 2 and output 1 will be operated in the same way.
Input mode
Up
Input mode
Up
Output
mode
setting
F
Down
Up/Down A, B, C
Output
mode
setting
RESET
999999
SV2
K
Down
Up/Down A, B, C
RESET
999999
SV2
SV1
SV1
0
0
T
T
T
T
T
T T
T
T
T
T
T
T
T
T
T T
T
T
T
OUT1
OUT1
OUT2
OUT2
N
P
RESET
999999
SV2
SV1
SV1
0
0
T
T
T
T
T
TT
T
T
T
T
Q
RESET
999999
T
T
T
TT
T
T
T
T
TT
T
T
T
T
T T
T
T
T
RESET
999999
SV2
SV2
SV1
SV1
0
0
T
T
T
T
T
T
T
T T
T
T
T
T
OUT1
OUT1
OUT2
OUT2
A
RESET
T
RESET
999999
999999
SV2
SV2
SV1
SV1
0
0
T
T
T
T
T
TT
T
T
T
OUT1
T
T
T
T
OUT1
OUT2
OUT2
2007-05-09
T
T
OUT2
OUT2
R
T
OUT1
OUT1
C
RESET
999999
SV2
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CTA USER MANUAL
Input mode
Up/Down A, B, C
Output
mode
setting
S
RESET
999999
SV2
SV1
0
OUT1
OUT2
T
RESET
999999
SV2
SV1
0
OUT1
OUT2
D
RESET
999999
SV2
SV1
0
OUT1
OUT2
2.2.4 Batch counting
When the PV equals SV, output 2 will be enabled and the batch PV will plus 1. The PV will be cleared and the
counting will restart. This will repeat until the batch PV reaches batch SV and output 1 will be enabled.
For example: A fruit packaging machine has to package 100 boxes with 5 fruit in each box. In this case, set the SV
as 5 and batch SV as 100. When the belt starts to package the fruit, output 2 will inform the motor of the moving
and plus 1 to the batch counter. After repeating the process for 100 times, i.e. 500 fruit of 100 boxes are
packaged, output 1 will be enabled and notify the user by sound, light or indicator that the packaging has been
completed.
2.2.5 Total counting
There is only one SV in total counting. When the PV equals SV, the output will be enabled. If the clear signal is
enabled now, the counting will restart and PV will be accumulated into the total counter.
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2007-05-09
CTA USER MANUAL
For example: An egg packaging machine packages 5 eggs as a unit. After the 5 eggs are packaged, output 1 and
output 2 will be enabled at the same time and the motor will be informed to move to the next package. This
process will repeat and record the number of eggs packaged in the total counter for the user to check at any
time.
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
2.3 Tachometer
The tachometer in CTA measures the pulse width and displays the current frequency. The measuring and
displaying unit in the tachometer is frequency (Hz); therefore, if you want the value to be displayed in rotation
speed (rpm), you have to convert the frequency into rotation speed. See 2.3.3 for how to convert.
2.3.1 Setting up the parameters in the tachometer
To enter the page for parameter setting of the tachometer, press
in the main menu for more than 3 seconds.
for more than 3 seconds under any of the parameter page you are in and
After the setup is completed, press
return to the main menu.
x
z
x
x
x
Select functions: There are 4 modes in CTA, (left to right) timer, counter, tachometer and timer + counter.
x
x
x
x
z
Select output modes: There are 4 output modes, 2Lo1Lo, 2Lo1Hi, 2Hi1Lo and 2Hi1Hi. For example, when you
select 2Hi1Lo, and assume the first set value is 100 (2Hi) and the second 50 (1Lo), the output value of the
tachometer will be below 100 (2Hi) and above 50 (1Lo) and CTA will not perform an output. If the set value
exceeds the range, CTA will perform an output.
z
Select rotation speed: Maximum 10Kcps; others 5K, 1K, 200, 30 and 1cps.
z
Set up the position of decimal point: 0 (no decimal point), 1 (one digit after decimal point), 2 (two digits
after decimal point), 3 (three digits after decimal point)
z
Set up pre-scale value: 1.000 (default 1:1) Range: 0.001 ~ 99.999
z
Set up the delay time after switching on the power: 0.0 (default). The tachometer will start to run when the
set delay time is due after the power is switched on. Setup range: 0.1 ~99.9 seconds.
z
Set up average value of the input filter: The average value is for making the present value detected by the
tachometer more stable. The setup range is 0 ~ 3 (1 = 2 data, 2 = 4 data, 3 = 8 data). For example, if you
select “3”, the system will average the 8 present values from the tachometer to make the present value
displayed on the screen more stable.
z
Set up minimum width of reset signal: Default = 20ms; 1ms is also selectable.
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Select input signal types: NPN and PNP.
Back to Top
z
2.3.2 Setting up output mode of the tachometer
There are 4 output modes in the tachometer, 2Lo1Lo, 2Lo1Hi, 2Hi1Lo and 2Hi1Hi.
Take 2Lo1Lo for example, assume the set value of output 2 is 100 and 50 for output 1, when the present value
measured by the tachometer is below 50, output 1 and output 2 will both be enabled.
2Lo1Lo
OUT2 set value
2Lo1Hi
OUT2 set value
(LO-LO)
Measurement value
Measurement value
OUT1 set value
OUT1 set value
OUT1
OUT1
OUT2
OUT2
Measurement value
(LO-HI)
OUT1 set value : OUT1 ON
OUT2 set value : OUT2 ON
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Measurement value
Measurement value
- 19 -
OUT1 set value : OUT1 ON
OUT2 set value : OUT2 ON
2007-05-09
CTA USER MANUAL
2Hi1Lo
OUT2 set value
2Hi1Hi
OUT2 set value
Measurement value
Measurement value
OUT1 set value
OUT1 set value
OUT1
OUT1
OUT2
Measurement value
Measurement value
(HI-HI)
(HI-LO)
OUT2
OUT1 set value : OUT1 ON
OUT2 set value : OUT2 ON
Measurement value
Measurement value
OUT1 set value : OUT1 ON
OUT2 set value : OUT2 ON
2.3.3 Calculating the unit of rotation speed
The tachometer is able to receive an open collector type input signal of maximum 10KHz and displays the unit as
Hz on the screen of the tachometer. Therefore, if you wish the rotation speed to be displayed in rpm, you have to
convert Hz into rpm by an equation and fill the obtained value into
rotation speed in rpm on the screen.
of the tachometer to display the
The conversion equation:
Frequency (Hz) × Pre-scale = Rotation Speed (rpm)
Pre-scale = 60/N
※N = Number of pulses per revolution (ppr)
Example 1: Connecting Delta servo drive with a servo motor and measure the current rotation speed by CTA
The built in encoder in Delta servo motor is 10,000ppr with four phases, OA, OB, OA and OB . Every phase is
2,500ppr.
Pre-scale = 60/2,500 = 0.024
At this time, the servo inputs 240rpm, equivalent to the tachometer receiving 10KHz currently.
Frequency and rotation speed of CTA connected to Delta servo drive:
Frequency
10KHz
5KHz
1KHz
200Hz
Rotation speed
240rpm
120rpm
24rpm
4.8rpm
Note: OA and OB of Delta ASD servo motor A and B series only support differential signals. OZ (10,000ppr) supports
open collector.
Example 2: Measuring the current rotation speed of the AC fan motor through a sensor
Figure 1: 1 revolution of the fan equals 1 pulse; therefore
Pre-scale = 60/N = 60/1 = 60
At this time, the sensor detects the speed and sends it back to tachometer. Assume the value displayed on
the screen is 2,700rpm,
F × 60/1 = 2,700
F = 45Hz
Figure 2: 1 revolution of the fan equals 3 pulses; therefore
Pre-scale = 60/N = 60/3 = 20
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
At this time, the sensor detects the speed and sends it back to tachometer. Assume the value displayed on
the screen is 3,200rpm,
F × 60/3 = 3,200
F = 160Hz
Figure 1
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
Figure 2
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2007-05-09
CTA USER MANUAL
2.4 Timer + Counter (Mixed Mode)
CTA offers timer + counter mode. The timer corresponds to OUT1 (output 1) and the counter to OUT2 (output2).
In this mode, the timer and counter both have a phase signal input; therefore, part of the functions will be
limited. For example, there are 12 output modes for the timer of CTA, but only 8 output modes available in the
timer + counter mode (Rcy2, Scon, Ston and Stoff are not available). In addition, the mixed mode only offers
input modes Up and Down for the counter and S, T, D are no longer available in the output modes. See 2.4.1. for
how to set up the parameters in the mixed mode.
2.4.1 Setting up the parameters in the “timer + counter”
To enter the page for parameter setting of the timer + counter, press
in the main menu for more than 3
for more than 3 seconds under any of the parameter page you
seconds. After the setup is completed, press
are in and return to the main menu.
x
z
x
x
z
z
z
z
x
x
Select timer mode: counting up and counting down
x
x
x
x
x
x
x
x
Select output modes: There are 8 output modes. The user can choose the mode that best meets the demand.
See 2.1.3 for more details.
x
x
x
x
x
x
x
x
x
x
Select display unit: the min. unit 10ms ~ the max. unit hour are selectable
x
z
x
Select functions: There are 4 modes in CTA, (left to right) timer, counter, tachometer and timer + counter.
x
Select input modes: Only counting up and counting down are available. See 2.2.2 for more details.
x
x
x
x
x
x
x
x
Select output modes: Same as the output modes of the counter except for S, T, D. See 2.2.3 for more details.
x
x
x
x
x
z
Select counting speed: Maximum 5Kcps; others 1K, 200, 30 and 1cps.
z
Select pulse width of output 1: The default output time is 0.02 second. When the parameter is set to 0.00
second, the output status will continue.
z
Pulse width of output 2: This parameter is adjustable according to different output modes selected. If the
output mode is C, the default output time will be 0.02 second. When the parameter is set to 0.00 second, the
output status will continue.
z
Set up the position of decimal point: 0 (no decimal point), 1 (one digit after decimal point), 2 (two digits after
decimal point), 3 (three digits after decimal point)
z
Set up pre-scale value: 1.000 (default 1:1) Range: 0.001 ~ 99.999
z
Save the data while switching off the power: When SAVE is selected, the PV will be saved; when CLEAR is
selected, the PV will not be saved.
z
Set up minimum width of reset signal: Default = 20ms; 1ms is also selectable.
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Select input signal types: NPN and PNP
z
Back to Top
2007-05-09
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
CHAPTER THREE:
APPLICATIONS
3.1 On Cut-To-Length Machines
The machine adopts the counter function in CTA and acquires the feedback signal from the encoder for measuring
the actual operation distance. When the set distance is reached, the output signal will enable the knife for the
cutting.
Example: We will simulate the action above by using CTA and Delta ASDA-A.
ƒ Parameter settings
x
z
Select function: Counter
z
Select counting mode: 1-stage counting (only 1 set value). If you need 2 set values, select 2-stage
counting.
z
Select input mode: Quadrature input
z
Select output mode: C; the counting will automatically restart when the set value is reached.
x
x
x
x
z
Select counting speed: The maximum 10K
z
Set up pulse width of output 2: 0.02 second
z
Set up the position of decimal point: 0 (no decimal point)
z
Set up pre-scale value: 0.056
z
Save the data while switching off the power: Select CLEAR, and the PV will not be saved.
z
Set up min. width of reset signal: select default value 20ms.
x
x
x
x
x
x
Select input signal type: NPN
z
Back to Top
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
- 23 -
2007-05-09
CTA USER MANUAL
ƒ Output Wiring
Connect
0V,
CP1 (phase A) and
CP2 (phase B) to CN1 terminal on ASDA-A servo drive
Assume
The set value in the CTA counter is 160mm. When the counting reaches 160mm, an output signal will be given
to the knife for the cutting. See figure 2.
In the figure, we can see the diameter of the roller is 44.8mm
Delta encoder 1 phase = 2,500ppr
Calculate the pre-scale value
π
D = Prescale
ppr
π: 3.1416
D: diameter of the roller
ppr: number of pulses per revolution of the encoder
Prescale = π
D = 3.1416 x 44.8 = 0.056mm/pulse
2500
ppr
When the value in CTA = 2,858
2858 x 0.056 = 160mm (actual moving distance)
100mm
Figure 1
Figure 2
SV has to be 160mm
2007-05-09
The servo drive stops at 100mm on the ruler before its
operation
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© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
CTA USER MANUAL
Ruler at 60mm
Figure 3
Figure 4
When the tachometer reaches 160mm, the output will
be enabled.
© DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
- 25 -
The distance moved is 160mm. The ruler stops at
60mm.
2007-05-09
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