Appendix
A.2 Modbus RTU
SENTRON PAC3100
134 Manual, 07/2009, A5E02385159B-01
A.2.8 Modbus status parameters with the function code 0x02
Status parameters
You can use the MODBUS function code 0x02 on all the status parameters listed below.
Table A- 10 Status parameters
Offset Number of
registers
Name Format Value range Access
108 0 Relevant parameter changes Bit R
110 0 Maximum pulse rate exceeded Bit R
111 0 Restart of the device Bit R
112 0 Resetting of energy counter by user Bit R
117 0 Maximum pulse rate exceeded Bit R
124 0 No synchronization pulse Bit R
125 0 Device Configuration menu is active Bit R
126 0 Voltage overload Bit R
127 0 Current overload Bit R
200 0 Digital input 0 Bit R
201 0 Digital input 1 Bit R
300 0 Digital output 0 Bit R
301 0 Digital output 1 Bit
0 =
Not active
1 =
active
R
A.2.9 Modbus settings with the function codes 0x03, 0x04 and 0x10
Addressing the settings
You can use the MODBUS function codes 0x03, 0x04 for read accesses and 0x10 for write
accesses on all the settings parameters listed below.
Table A- 11 Settings parameters
Offset Number of
registers
Name Unit Format Value range Access
0 = 3P4W 50001 2 Connection type - unsigned long
1 = 3P3W
RW
0 = No 50003 2 Voltage measurement
using voltage
transformers?
- unsigned long
1 = Yes
RW
50005 2 Primary voltage - unsigned long 1 ... 999999 V RW
50007 2 Secondary voltage - unsigned long 1 ... 480 V RW
50011 2 Primary current - unsigned long 1 ... 99999 A RW
50013 2 Secondary current - unsigned long 5 A R
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