ABB M101 - Redundant MNS Digital Gateway Modbus Data; Table 31 Default Bit Map Control Commands High Byte; Table 32 Redundant Data for Monitoring by the Modbus Master; Table 33 Redundant Command Possible from the Modbus Master

DATA MAPPING DEFAULT DATA MAP
1TGC908004M0201 57
Table 31 Default Bit Map Control Commands High Byte
9.2.8. Redundant MNS Digital Gateway Modbus Data
The following additional data mapping is provided for a redundant data interface to deter-
mine the status of MNS Digital Gateway (Primary/Backup, Redundancy Error). It is also possi-
ble to send commands to force a change-over.
Modbus
Function
Code
Modbus-
Register
Modbus Register
Name
Format Description/Remarks
2 12001 Primary MNS
Digital Gateway
Bit Set to 1 indicates MNS Digital
Gateway is Primary
2 12002 Redundancy Error Bit Set to 1 indicates Redundancy er-
ror.
Table 32 Redundant data for monitoring by the Modbus master
Modbus
Function
Code
Modbus-
Register
Modbus Register
Name
Format Description/Remarks
6/16 44001 Force to changeover
to Backup MNS Digi-
tal Gateway
Unsigned In-
teger 2Byte
Master must send 0x0001 to
force to changeover
This command may be sent to either the Primary or Backup MNS Digital Gateway to in-
itiate a changeover.
Table 33 Redundant Command possible from the Modbus Master
In case of a project specific mapping is used it is mandatory that above
redundancy information is configured in the mapping of the respective
fieldbus.
Bit 15 Bit 14 Bit 13 Bit 12 Bit 11 Bit 10 Bit 09 Bit 08 Register
45001
1 1 1 1 1 1 1 1 Device
Number
GO1
Reset
GO1
Set
GO0
Reset
GO0
Set
Bus
Local
TOL
Bypass
Bit Function