Modbus Device Information With The Function Codes 0X03, 0X04 And 0X10 - Siemens SENTRON PAC RS485 Manual

Offset Number of Name
registers
63019 2 MODBUS address
or Seabus address
63021 2 Baudrate
63023 2 Data bits / Parity bits
/ Stop bits
63025 2 Response time
1) Only for the PAC RS485 expansion module
See also
Modbus measured variables with the function codes 0x03 and 0x04 (Page 33)
5.1.11

Modbus device information with the function codes 0x03, 0x04 and 0x10

Addressing the device information parameters
You access the following device information parameters block-by-block only, e.g. read from
Offset 64001 27 Register.
NOTICE
Error in the case of inconsistent access to I&M data
Please ensure the start offset and the number of registers are correct when making read
accesses and write accesses. Always read or write the entire block.
Please ensure the start offset and the number of registers are correct when making write
accesses.
If a value consists of several 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.
PAC RS485
Manual, 02/2008, A5E02091800B-01
Unit
-
1)
-
1)
-
1)
ms
1)
Format Applicable
MODBUS
function codes
0x03
unsigned long •
0x04
•
0x10
•
0x03
unsigned long •
0x04
•
0x10
•
0x03
unsigned long •
0x04
•
0x10
•
0x03
unsigned long •
0x04
•
0x10
•
Parameter assignment/Addressing
5.1 MODBUS RTU
Value range
from ... to
1 ... 247
0 = 4,800 bit/s
1 = 9,600 bit/s
2 = 19,200 bit/s
3 = 38,400 bit/s
Default value = 2
0 = 8N2
1 = 8E1
2 = 8O1
3 = 8N1
0 ... 255
0 = Auto
Access
RW
RW
RW
RW
53