User Guide Addendum - nanodac Datalogger/Regelaar

User Guide Addendum - nanodac Datalogger/Regelaar
nanodac™
User Guide
Addendum
nanodac™ recorder/controller
Versions 2.3 and later
HA031164/1
Aug 2011
© 2011 Eurotherm Limited
All rights are strictly reserved. No part of this document may be reproduced, modified, or transmitted in any form by any means, nor may it be stored in a retrieval system other than for the purpose
to act as an aid in operating the equipment to which the document relates, without the prior, written
permission of Eurotherm Limited.
Eurotherm Limited pursues a policy of continuous development and product improvement. The
specification in this document may therefore be changed without notice. The information in this
document is given in good faith, but is intended for guidance only. Eurotherm Limited will accept
no responsibility for any losses arising from errors in this document.
nanodac RECORDER/CONTROLLER: USER GUIDE ADDENDUM
1 INTRODUCTION
This document describes enhancements to the nanodac instrument, which have been introduced since issue three of the main manual was produced. These enhancements are described in the following sections:
2 Dual channel inputs.
3 Sensor break detection for mA inputs.
4 Errata - corrections to and omissions from the main manual
References to ‘the main manual’ refer to issue 3 of the nanodac user guide HA030554.
2 DUAL CHANNEL INPUTS
This is a cost option, enabled on a channel-by-channel basis
by means of entering the relevant password in the ‘Feature3
Pass’ field in Instrument.Security menu. (Similar to ‘Feature2
Pass’ described in section 4.1.6 (Security menu) of the main
manual.)
For each enabled channel, a pair of mV or mA inputs can be
terminated at the analogue input terminals (An In1 to An In
4 in figure 2.2 in the main manual), Thermocouple inputs are
also available - please contact the supplier for advice.
For each enabled channel, the inputs are called ‘primary’ and ‘secondary’, terminated as shown in ‘Wiring’,
below. The primary inputs 1 to 4 are assigned to channels 1 to 4, as normal. Each secondary input must be
soft wired to a maths channel configured as Operation = ‘Copy’ if it is to be recorded/displayed/alarmed
etc. Soft wiring is described in Section 7 of the main manual (User wiring) and maths channels are described
in section 4.5.1 (Maths channel configuration) in the same document.
2.1 WIRING
The figure below gives wiring details for the four analogue input channels. See figure 2.2 of the main manual
for wiring details for other inputs.
&
Note: For maximum accuracy, it is recommended that separate returns are used to the negative terminals.
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2.2 CHANNEL (MAIN) CONFIGURATION
Figure 2.2, below shows a typical channel configuration page for the case where channel type is set to ‘Dual
mA;. Dual mV and Dual T/C (if fitted) are similar. See section 4.4.1 of the main manual for further details.
Figure 2.2 Typical channel configuration page.
2.2.1 Channel Main parameters
Descriptor
PV
Status
Addendum 1
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Allows a (20 character max.) descriptor to be entered for the channel. Some thought
should be given to ensure that the descriptor is meaningful because in some display
screens it is truncated. For example, ‘Furnace 1 area 1’ and ‘Furnace 1 area 2’ might
both appear as ‘Furnace 1 a’ and thus be indistinguishable from one another, except in
background colour.
Read only. Displays the current value of the primary input.
Read only. Shows the primary input status as one of: ‘Good’, ‘Channel Off’, ‘Over
range’, ‘Under range’, ‘HW error’, ‘Ranging’, ‘HW (capability) exceeded’.
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2.2.1 CHANNEL MAIN PARAMETERS (Cont.)
PV2
Status2
IP Adjust State
IP Adjust State2
Resolution
Units
Type
Test signal
Input Low*
Input High*
Shunt value
Lin type
Range Low*
Range High*
Range Units
Scale Low/High
Scale Low2/High2
Offset
Offset2
Read only. Displays the current value of the secondary input.
Read only. Shows the secondary input status as one of: ‘Good’, ‘Channel Off’, ‘Over
range’, ‘Under range’, ‘HW error’, ‘Ranging’, ‘HW (capability) exceeded’.
Appears only if the relevant primary channel has been adjusted using the ‘Input Adjust’
procedure described in section 4.1.8 of the main manual and section 2.3, below.
As ‘IP Adjust State’, above but for secondary channels.
Allows the number of decimal places to be defined for the channel. Valid entries are
zero to nine.
Allows a units string of up to five characters to be entered.
Allows the user to select an input type for the channel. Available selections are: ‘Off’,
‘Thermocouple’, ‘mV’, ‘V’, ‘mA’, ‘RTD’, ‘Digital’, ‘Test’ or ‘Ohms’, Dual mV, Dual mA, Dual
T/C (if enabled).
Appears only if ‘Test’ is selected as ‘Type’. Allows either a sinusoidal or a triangular
waveform to be selected at one of a number of cycle times between 40 seconds and
five hours.
For Type = mV, Dual mV, V, mA, Dual mA or Ohms, the lowest value of the applied signal in electrical units.
As ‘Input Low’, but the highest value of the applied signal in electrical units.
For mA and Dual mA input types only, this allows the value of the shunt resistor (in
Ohms) to be entered. The recorder does not validate this value - it is up to the user to
ensure that the value entered here matches that of the shunt resistor(s) fitted. For Dual
mA input type, both primary and secondary inputs must have independent shunts each
of the same value.
Linear, Square root, x3/2, x5/2, User Lin.
Thermocouple types (alphabetical order): B, C, D, E, G2, J, K, L, N, R, S, T, U, NiMo/
NiCo, Platinel, Ni/MiMo, Pt20%Rh/Pt40%Rh.
User 1 to User 4
Resistance thermometer types: Cu10, Pt100, Pt100A, JPT100, Ni100, Ni120, Cu53.
See Appendix A of the main manual for input ranges, accuracies etc. associated with
the above thermocouple and RTD types. See section 4.9 of the manual for details of
user linearisations.
For thermocouples, RTDs, User linearisations and retransmitted signals only, the lowest
value of the required linearisation range.
For thermocouples, RTDs, User linearisations and retransmitted signals only, the highest
value of the required linearisation range.
For thermocouples only and RTDs, Select °C, °F or K.
Maps the process value of the primary input to (Scale High - Scale Low). For example,
an input of 4 to 20mA may be scaled as 0 to 100% by setting Scale low to 0 and Scale
High to 100.
As ‘Scale Low/High but for the secondary input (PV2).
Allows a fixed value to be added to or subtracted from the value of the primary process
variable.
The nature of the secondary input results in an offset being introduced into the process
variable value.
For mA inputs this offset is removed automatically, without user intervention.
For mV inputs the offset depends on the value of the voltage source impedance and is
equal to 199.9μV/Ω. This offset can be compensated for eithrer by using this Offset2
parameter, or by carrying out the ‘Input Adjust’ procedure.**
For Dual T/C inputs, it is recommended that the ‘Input Adjust’ procedure** be used instead of Offset2 as the use of Offset2 results in an offset which is non-linear over the
thermocouple range.
* See section 4.9 of the main manual for details of the configuration of Range High/Low and Input
High/Low when ‘Type’ = User 1 to User 4.
** The ‘Input Adjust’ procedure is described in section 4.1.8 of the main manual and section 2.3,
below.
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2.2.1 CHANNEL MAIN (Cont.)
Input filter
Damping can be used to filter out noise from slowly changing signals so that the underlying trend can be seen more clearly. Valid input values are between 0 and 60 seconds.
Note: Applying a filter to an input channel can affect the operation of any Rate-of-change alarms
configured to act on that channel.
CJC Type
For thermocouple input types only, this allows the user to select ‘None’, ‘Internal’, ‘External’ or ‘Remote 1’ to ‘Remote 4’. For Dual T/C inputs, both primary and secondary
inputs use the same cold junction.
None: No cold junction compensation applied.
‘Internal’ uses the recorder’s internal cold junction temperature measurement.
‘External’ means that the cold junction is to be maintained by the user, at a fixed, known
temperature. This temperature is entered in the ‘External CJ Temp’ field which appears
when ‘External’ is selected.
Remote 1 (2) (3) (4) means that the cold junction temperature is being measured by input channel 1 (2) (3) (4) respectively. (This must be a different channel from that currently being configured).
Ext. CJ Temp
Appears only if CJC type is set to ‘External’, and allows the user to enter the temperature at which the external cold junction is being maintained.
Sensor Break Type Defines whether the sensor break becomes active for circuit impedances greater than
expected.
‘Off’ disables Sensor Break detection.
Break Low: Sensor break active if measured impedance is greater than the ‘Break Low
impedance’ value given in table 2.2.1.
Break High: Sensor break active if measured impedance is greater than the ‘Break
High Impedance’ value given in table 2.2.1. See also Section 2.6.2 below.
Fault Response
Specifies the behaviour of the instrument if a sensor break is detected or if the input is
over driven (saturated high or low).
‘None’ means that the input drifts, with the wiring acting as an aerial.
‘Drive High’ means that the trace moves to (Scale High +10%). ‘Drive Low’ means that
the trace moves to (Scale Low -10%), where the 10% values represent 10% of (Scale
High - Scale Low).
Sensor Break Val
A diagnostic representation of how close the sensor break detection circuitry is to tripping.
Measured Value
The (read only) measured value of the primary input before any scaling or linearisation
is applied.
Measured Value2 As ‘Measured Value’, above but for the secondary input.
Internal CJ temp
The (read only) temperature of the internal cold junction associated with this channel.
Range
40mV
80mV
2V
10V
Break Low Break High
impedance Impedance
~5kΩ
~5kΩ
~12.5kΩ
~12.5kΩ
~20kΩ
~20kΩ
~70kΩ
~120kΩ
Table 2.2.1 Minimum impedances for sensor break detection
Note: Break High impedance values would be used typically for sensors which have a high nominal
impedance when working normally
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2.2.2 Other channel parameters
See sections 4.4.2 and 4.4.3 of the main manual for details of channel trend and alarm parameters respectively.
Note: Trend colours and alarm settings for secondary inputs are configured in the maths channels
to which they are wired.
2.3 INPUT ADJUST
Input adjust is carried out as described in section 4.1.8 of the main manual, except that where dual inputs
are configured, the user must initiate adjustment to primary and secondary inputs separately. As shown in
figure 2.3, a new field ‘Input on Channel’ is introduced for this purpose.
Figure 2.3 Input adjust top level display
For primary inputs, all four channels are included in the list and can therefore be selected for adjustment.
For secondary inputs, only those channels which have been configured as dual input are included.
2.4 NON-VOLATILE PARAMETERS
The following are additional to the non-volatile parameters list in section 5.2.4 of the main manual:
Channel.N.Offset2
Channel.N.ScaleLow2
Channel.N.ScaleHigh2
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2.5 PARAMETER LIST
The items listed below are additional to the parameters listed in section 5.3 of the main manual.
Parameter path
Description
Type
Hex
Dec
Resolution
Channel.1.Main.IPAdjustState2
Channel.1.Main.MeasuredValue2
Channel.1.Main.Offset2
Channel.1.Main.PV2
Channel.1.Main.ScaleHigh2
Channel.1.Main.ScaleLow2
Channel.1.Main.Status2
0 = Unadjusted; 1 = Adjusted
Measured value of channel 1 secondary input
Channel 1 secondary input offset
The secondary input process variable (output) of channel 1
Scale high value for channel 1 secondary input
Scale low value for channel 1 secondary input
Channel 1 secondary input PV (output) status
0 =Good
1 = Off
2 = Over range
3 = Under range 4 = HW error
5 = Ranging
6 = Overflow
7 = bad
8 = HW exceeded
9 = No data
12 = Comm channel error
Specifies the type of channel
0 = Off
1 = TC
2 = mV
3=V
4 = mA
5 = RTD
6 = Digital
7 = Test
8 = Ohms
9 = Dual mV
10 = Dual mA 11 = Dual T/C
bool
float32
float32
float32
float32
float32
uint8
181c
1819
1818
0110
181b
181a
0111
6172
6169
6168
272
6171
6170
273
Not applicable
Set by Channel.1.Main.Resolution
3dp
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Not applicable
uint8
1800
6144
Not applicable
Channel.1.Main.Type
Channel.2.Main.IPAdjustState2
Channel.2.Main.MeasuredValue2
Channel.2.Main.Offset2
Channel.2.Main.PV2
Channel.2.Main.ScaleHigh2
Channel.2.Main.ScaleLow2
Channel.2.Main.Status2
Channel.2.Main.Type
0 = Unadjusted; 1 = Adjusted
Measured value of channel 2 secondary input
Channel 2 secondary input offset
The secondary input process variable (output) of channel 2
Scale high value for channel 2 secondary input
Scale low value for channel 2 secondary input
Channel 2 secondary input PV (output) status (as channel 1)
Specifies the type of channel (as channel 1)
bool
float32
float32
float32
float32
float32
uint8
uint8
189c
1899
1898
0114
189b
189a
0115
1880
6300
6297
6296
276
6299
6298
277
6272
Not applicable
Set by Channel.1.Main.Resolution
3dp
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Not applicable
Not applicable
Channel.3.Main.IPAdjustState2
Channel.3.Main.MeasuredValue2
Channel.3.Main.Offset2
Channel.3.Main.PV2
Channel.3.Main.ScaleHigh2
Channel.3.Main.ScaleLow2
Channel.3.Main.Status2
Channel.3.Main.Type
0 = Unadjusted; 1 = Adjusted
Measured value of channel 3 secondary input
Channel 3 secondary input offset
The secondary input process variable (output) of channel 3
Scale high value for channel 3 secondary input
Scale low value for channel 3 secondary input
Channel 3 secondary input PV (output) status (as channel 1)
Specifies the type of channel (as channel 1)
bool
float32
float32
float32
float32
float32
uint8
uint8
191c
1919
1918
0118
191b
191a
0119
1900
6428
6425
6424
280
6427
6126
281
6400
Not applicable
Set by Channel.1.Main.Resolution
3dp
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Not applicable
Not applicable
Channel.4.Main.IPAdjustState2
Channel.4.Main.MeasuredValue2
Channel.4.Main.Offset2
Channel.4.Main.PV2
Channel.4.Main.ScaleHigh2
Channel.4.Main.ScaleLow2
Channel.4.Main.Status2
Channel.4.Main.Type
0 = Unadjusted; 1 = Adjusted
Measured value of channel 4 secondary input
Channel 4 secondary input offset
The secondary input process variable (output) of channel 4
Scale high value for channel 4 secondary input
Scale low value for channel 4 secondary input
Channel 4 secondary input PV (output) status (as channel 1)
Specifies the type of channel (as channel 1)
bool
float32
float32
float32
float32
float32
uint8
uint8
199c
1999
1998
011c
199b
199a
011d
1980
6556
6553
6552
284
6555
6554
285
6528
Not applicable
Set by Channel.1.Main.Resolution
3dp
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Set by Channel.1.Main.Resolution
Not applicable
Not applicable
Instrument.Security.Feature2Pass*
Instrument.Security.Feature3Pass
Features2 pass code (manufacturer supplied)
Features3 pass code (manufacturer supplied)
int32
int32
10c4
10c5
4292
4293
Not applicable
Not applicable
*Omitted in error from main manual
2.6 OTHER ITEMS
2.6.1 Sample rate
For dual input channels, both primary and secondary sample rate is reduced to 4 Hz (250ms) from the normal 8Hz (125ms).
2.6.2 Sensor break detection
Input sensor break detection is not supported for secondary inputs. The internal circuit acts as a ‘pull up’ on
the secondary input which therefore saturates high in the event of a sensor break.
2.6.3 Dual mA input offset correction
If ‘Dual mA’ is selected as input type, then an automatic offset correction will be made, according to the entered shunt value.
2.6.4 Input range limitation
There is no 10V range associated with the secondary input. Any input greater than +2Vor less than -2V is
deemed to be ‘bad range’.
Addendum 1
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3 MILLIAMP INPUT SENSOR BREAK ACTION
Previous software versions have not supported sensor break detection for mA inputs. With this software issue, mA inputs have limits applied, such that if the process value lies outside these limits, a sensor break is
assumed to have occured. These limits are (Input lo - 4% Span) and (Input high + 6% Span).
For example, for a 4 to 20mA signal, an input below 3.36mA or above 20.96mA will trigger a sensor break
event.
4 ERRATA
The following items are either incorrect in the main manual or were omitted from it in error.
4.1 LOW VOLTAGE OPTION RANGES
The Low Voltage option is incorrectly specified in Appendix A of the main manual. The correct figures are:
24Vac (-15% +10%) at 48 to 62Hz, or 24Vdc (-15% +20%).
4.2 POWER INTERRUPT INDICATION ON THE CHART
On power up, a red line is drawn across the chart.
On exiting configuration mode, a blue line is drawn across the chart.
When the instrument time is changed (manually - not through daylight saving action) a green line is drawn
across the chart.
4.3 DIGITAL INPUT RESPONSE
Digital inputs are sampled every 31.25 ms. These samples are 2-sample debounced resulting in a 62.5ms
contact closure response. A 62.5 ms pulse is latched until the next 125ms poll (8Hz). A 4Hz pulse stream is
therefore the fastest that can be accurately detected.
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Addendum 1
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© Copyright Eurotherm Limited 2011
Invensys, Eurotherm, the Eurotherm logo, Chessell, EurothermSuite, Mini8, EPower, nanodac, Eycon, Eyris, Foxbobo and Wonderware are trademarks of
Invensys plc, its subsidiaries and affiliates. All other brands may be trademarks of their respective owners.
All rights are strictly reserved. No part of this document may be reproduced, modified or transmitted in any form by any means, neither may it be stored in
a retrieval system other than for the purpose to act as an aid in operating the equipment to which the document relates, without the prior written permission of Eurotherm Limited.
Eurotherm Limited pursues a policy of continuous development and product improvement. The specifications in this document may therefore be changed
without notice. The information in this document is given in good faith, but is intended for guidance only.
Eurotherm Limited will accept no responsibility for any losses arising from errors in this document.
HA031164/1 (CN27585)
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