Appendix 1 Modbus Protocol
37
TI 01W01A56-01EN
[GW_STATUS]
Management Station operating status information is notified with the gateway status (GW_STA-
TUS).
The following table shows the attributes of the GW_STATUS.
GW_STATUS
(32bit x 8 : Unsigned16)
And the data elements of a device are mapped to Modbus registers as follows.
16
8 7
0
00000000
0x0080 (Reserved)
n
GW_STATUS (Upper 16bit)
n+1
~
~
GW_STATUS (Lower 16bit)
n+8
Below is an example of GW_STATUS information.
Modbus
Address
Name
Data Type
Contents
n
Data status
Unsigned16
Always 0x0080: Normal
n +1
Gateway status
Unsigned16
GW0/1 system error (0: No error, 1: Error detected)
GW1 in redundant system, GW0 in single system
Unsigned16
GW2 system error
(0: No error, 1: Error detected, 0xFFFF:Not used)
n +2
Unsigned16
GW0/1 system status (0: Ready, 1: Active, 2: Standby)
GW1 in redundant system, GW0 in single system
n +3
Unsigned16
GW2 system status
(0: Ready, 1: Active, 2: Standby, 0xFFFF:Not used)
n +4
n +5
Unsigned16
Status of field wireless device
0: No error (Join for all field wireless devices)
1: Error detected. (Leave for one or more field wireless devices)
n +6
~
n +8
Unsigned16
Always 0 (Reserved bits)
Mar. 31, 2014-00
