Siemens SENTRON PAC RS485 - Modbus Device Information with the Function Codes 0 X03, 0 X04 and 0 X10

Parameter assignment/Addressing
5.1 MODBUS RTU
PAC RS485
Manual, 02/2008, A5E02091800B-01
53
Offset Number of
registers
Name Unit Format Applicable
MODBUS
function codes
Value range
from ... to
Access
63019 2 MODBUS address
or Seabus address
1)
- unsigned long
• 0x03
• 0x04
• 0x10
1 ... 247 RW
63021 2 Baudrate
1)
- unsigned long
• 0x03
• 0x04
• 0x10
0 = 4,800 bit/s
1 = 9,600 bit/s
2 = 19,200 bit/s
3 = 38,400 bit/s
Default value = 2
RW
0 = 8N2
1 = 8E1
2 = 8O1
63023 2 Data bits / Parity bits
/ Stop bits
1)
- unsigned long
• 0x03
• 0x04
• 0x10
3 = 8N1
RW
63025 2 Response time
1)
ms unsigned long
• 0x03
• 0x04
• 0x10
0 ... 255
0 = Auto
RW
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.