Modbus; Measured Variables Without A Time Stamp With The Function Codes 0X03 And 0X04; Table A- 1 Measured Variables Available Without A Time Stamp; A.3 Modbus - Siemens SENTRON PAC4200 Manual

Appendix

A.3 MODBUS

A.3

MODBUS

A.3.1

Measured variables without a time stamp with the function codes 0x03 and 0x04

Addressing the measured variables without a time stamp
The SENTRON PAC Power Monitoring Device provides measured variables with or without
a time stamp.
NOTICE
Error in the case of inconsistent access to measured values
Please ensure the start offset of the register is correct when making read accesses.
Please ensure the start offset and the number of registers are correct when making write
accesses.
If a value consists of two registers, a read command applied in the second register, for
example, will generate an error code. SENTRON PAC will also output an error code if, for
example, a write operation ends in the middle of a multi-register value.
Table A- 1 Measured variables available without a time stamp
Offset Number of Name
registers
1 2 Voltage a-n
3 2 Voltage b-n
5 2 Voltage c-n
7 2 Voltage a-b
9 2 Voltage b-c
11 2 Voltage c-a
13 2 Current a
15 2 Current b
17 2 Current c
19 2 Apparent Power a
21 2 Apparent Power b
23 2 Apparent Power c
25 2 Active Power a
27 2 Active Power b
29 2 Active Power c
31 2 Reactive Power a (VARn)
33 2 Reactive Power b (VARn)
35 2 Reactive Power c (VARn)
37 2 Power Factor a
39 2 Power Factor b
196
Format Unit
Float V
Float V
Float V
Float V
Float V
Float V
Float A
Float A
Float A
Float VA
Float VA
Float VA
Float W
Float W
Float W
Float VAR
Float VAR
Float VAR
Float -
Float -
Value range Access
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
- R
0 ... 1 R
0 ... 1 R
SENTRON PAC4200
Manual, 09/2008, A5E02316180B-01