User manual

PTQ-104S Rev2 ♦ Quantum Platform Hot Standby Support
IEC 60870-5-104 Server for Quantum User Manual
ProSoft Technology, Inc. Page 107 of 195
February 22, 2013
7.2.2 Mapping the Backplane Extensions
A Modicon Quantum Hot Standby with Unity requires two backplanes with at
least four slots. The two backplanes must be mapped in an identical manner:
 same Modicon Quantum Hot Standby with Unity HE CPU with integrated
coprocessor (Copro)
 same firmware
o same revision level
o same Modicon Quantum power supply module
o same Modicon Quantum RIO Head
If other modules are used, for example local I/Os, NOMs, NOEs, these modules
must be identical.
For additional information on Modicon Quantum Hot Standby Startup support,
refer to the Unity Pro User Guide.
7.2.3 PTQ-104S Hot Standby Considerations
Limitations
The solution allows for up to six PTQ modules per rack (for both Primary and
Standby).
The PTQ-104S module cannot be installed in a RIO drop.
HSBY Operating Modes
Generally, the user will have full control over the switchover via the command
register through application program control. This is accomplished by the user
application through the SW60 command register.
PLC HSBY Command Register
The following illustration identifies the operating options provided by the
Command Register (%SW60). The Command Register defines the operation of
the Hot Standby application. That means both the Primary and Standby.
Therefore the Command Register is transferred to the Standby PLC each scan.
As a result, any changes made to the Command Register on the Standby PLC
will have no effect since the value transfer from the Primary side will overwrite it.