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6.2.3 Read Command
Modbus
Function
Code
03H
0080H
03H
0081H
03H
0082H
03H
0083H
03H
0084H
03H
0085H
(*1) For 'Not used' items, if a single piece of data Read/Write is executed, Exception code 2 (02H) will be returned.
(*2) The Read/Write range of setting values is different from that of keypad operation.
(*3) For writing OUT2 proportional band, write the multiplied value (0.0 to 10.0 times) of OUT1 proportional band.
For reading OUT2 proportional band, the controller internally calculates the value using OUT1 and OUT2 proportional bands, and returns
the result as response data.
Even if the multiplied value exceeds 10.0 times, the exceeding value will be returned as response data.
(*4) If EV1/EV2 alarm value is changed, EVT1/EVT2 high limit alarm value will be automatically changed to the same value.
(*5) If any action is changed in [Event output EV1 allocation] or [Event output EV2 allocation], the EV1 alarm value, EV2 alarm value, etc.
will revert to factory default value.
For the items to be initialized: Refer to Section "6.6 Items to Be Initialized by Changing Settings" (p.56).
The following items cannot be selected via software communication (They can only be set via the keypad):
High/Low limits independent alarm, High/Low limit range independent alarm, High/Low limits with standby independent alarm,
Loop break alarm, Time signal output, Output during AT, Pattern end output, Output via communication command, Heating/Cooling
control relay contact output (EV2 only)
(*6) For Control output OFF, if Control output OFF function is not selected in [OUT/OFF key function], Exception code 2 (02H) will be returned.
(*7) For Auto/Manual control, if Auto/Manual control is not selected in [OUT/OFF key function], Exception code 2 (02H) will be returned.
(*8) For Manual control MV, if Write is executed during automatic control, Exception code 2 (02H) will be returned.
If the following are written, Exception code 3 (03H) will be returned.
• When OUT1 is ON/OFF control, and if any items except OUT1 low limit and OUT1 high limit values are written.
• When Heating side (of Heating/Cooling control) is in ON/OFF control, and if any items – except Heating side OUT1 low limit/OUT1 high limit
value, and Cooling side OUT2 low limit/OUT2 high limit value – are written.
• When Cooling side (of Heating/Cooling control) is in ON/OFF control, and if any items – except Heating side OUT1 low limit/OUT1 high limit
value, and Cooling side OUT2 low limit/OUT2 high limit value – are written.
(*9) If Reserved items are read, acknowledgement will be returned (but data is 0).
If Reserved items are written, data will be discarded, and acknowledgement will be returned.
(*10) If "Key operation change flag clearing" is read, Exception code 2 (02H) will be returned.
If any value except 0001H (Clear key operation change flag) is written, Exception code 3 (03H) will be returned.
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Data Item
PV
OUT1 MV
OUT2 MV
Not used
(*1)
Not used
(*1)
Status flag
0000 0000 0000 0000
Read value, Decimal point ignored
Read value, Decimal point ignored
Read value, Decimal point ignored
0
2
OUT1 output
1
2
OUT2 output
2
2
EV1 output
3
2
EV2 output
4
2
Not used, Always 0
5
2
Not used, Always 0
6
2
Not used, Always 0
7
2
Loop break alarm
8
2
Overscale
9
2
Underscale
10
2
Control output OFF function
11
2
AT/Auto-reset, Perform/Cancel 0 : Cancel, 1: Perform
12
2
OUT/OFF key function
0: Control output OFF function 1 : Auto/Manual control
13
2
Not used, Always 0
14
2
Auto/Manual control
15
2
Change in key operation
Data
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : OFF
1 : ON
0 : Control output ON
1 : Control output OFF
0 : Automatic control
1 : Manual control
0 : No
1 : Yes
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