ScreenMaster RVG200
Paperless recorder
Appendix B – MODBUS TCP / MODBUS 485
OI/RVG200-EN
151
B.4 Operating mode MODBUS coils
Tables B.2 to B.11 detail the contents of each MODBUS coil. Each coil is assigned a register that can have
one of two values: 0000 and 0001.
Read only: 0 = OK, 1 = Fail
Read only: 0 = OK, 1 = Fail
Analog input
MODBUS coil
Analog input
MODBUS coil
A1
0001
C1
0013
A2
0002
C2
0014
A3
0003
C3
0015
A4
0004
C4
0016
A5
0005
C5
0017
A6
0006
C6
0018
B1
0007
D1
0019
B2
0008
D2
0020
B3
0009
D3
0021
B4
0010
D4
0022
B5
0011
D5
0023
B6
0012
D6
0024
Table B.2 Analog input fail states
Active / Inactive
state
Acknowledge state
Active / Inactive
state
Acknowledge state
Read
access
0 = Inactive
1 = Active
0 = Acknowledged or
inactive
1 = Active and
unacknowledged
Read
access
0 = Inactive
1 = Active
0 = Acknowledged or
inactive
1 = Active and
unacknowledged
Write
access
None
0 = No effect
1 = Acknowledge
Write
access
None
0 = No effect
1 = Acknowledge
Alarm
MODBUS coil
MODBUS coil
Alarm
MODBUS coil
MODBUS coil
1A
101
200
13A
149
249
1B
102
201
13B
150
250
1C
103
202
13C
151
251
1D
104
203
13D
152
252
2A
105
204
14A
153
253
2B
106
205
14B
154
254
2C
107
206
14C
155
255
2D
108
207
14D
156
256
3A
109
208
15A
157
257
3B
110
209
15B
158
258
3C
111
210
15C
159
259
3D
112
211
15D
160
260
Table B.3 Alarm states