ICP DAS USA GW-7553-B User Manual page 43

Table 15 Input data area
Module
System setting module
(diagnostic message)
Input module
EX. Input data area in byte 0 ~ byte5 information is "04 05 A0 02 00 FE",
"04" means there are 4 diagnostic messages
"02" means "Module 2 error!"
"FE" means "Response Message Timeout!"
4.6.2 Output data area and communication command
The maximum length of output data is 240 bytes. Before arrange the output
module, the user must arrange and configure the system setting module. The
first three bytes belong to communication commands, as shown in Table 16.
The user can change data and I/O state of Modbus Slave device or
DI/DO/AI/AO data of GW-7553-B / GW-7553-M by modify data of output
module.
Table 16 Output data area
Module Byte
System
setting
module
GW-7553-B / GW-7553-M PROFIBUS/Modbus TCP Gateway User Manual (Version 1.35, May/2017)
PAGE: 43
Byte Data
0
1 00or05
2 00orA0
3
4
5
6~239 Data
Bit Position
7 6 5
0
- - -
1
The number of Diagnostic messages
Fixed value(The value is00 when byte 0 is 0,
The value is 05 when byte 0 is not 0)
Fixed value(The value is00 when byte 0 is 0,
The value isA0 when byte 0 is not 0)
Message(refer to Table 14)
00 Fixed value
Description(refer to Table 14)
Receive data
4 3 2 1 0
- - - SM DC Control bit
Description
Description
Data output command