Redundant Digital Gateway Modbus Data; Figure 1: Digital Gateway; Table 32 Default Bit Map Control Commands High Byte; Table 33 Redundant Data For Monitoring By The Modbus Master - ABB LVS Digital Manual

D EFAULT DATA MAP
Bit 15 Bit 14
1 1
GO1 GO1
Reset Set

Table 32 Default Bit Map Control Commands High Byte

Redundant Digital Gateway Modbus Data

The following additional data mapping is provided for a redundant data interface to deter-
mine the status of Digital Gateway (Primary/Backup, Redundancy Error). It is also possible to
send commands to force a change-over.
Modbus
Function
Code
2
2

Table 33 Redundant data for monitoring by the Modbus master

Modbus
Function
Code
6/16

Table 34 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.
62
Bit 13 Bit 12
1 1
GO0 GO0
Reset Set
Modbus- Modbus Register
Register Name
12001 Primary MNS
Digital Gateway
12002 Redundancy Error
Modbus- Modbus Register
Register Name
44001 Force to changeover
to Backup Digital
Gateway
This command may be sent to either the Primary or Backup Digital Gateway to initiate
a changeover.
Bit 11 Bit 10 Bit 09
1 1 1
Bus
Local
Format Description/Remarks
Bit Set to 1 indicates Digital Gateway
is Primary
Bit Set to 1 indicates Redundancy er-
ror.
Format
Unsigned In-
teger 2Byte
DATA MAPP ING
Bit 08 Register
45001
1 Device
Number
TOL
Bit Function
Bypass
Description/Remarks
Master must send 0x0001 to
force to changeover
1 TG C90 80 04