Duplexing Interface Module (If719/If728/If748) - Toshiba V Series User Manual

Mode switch
The mode switch is a key switch with three positions: "HALT", "RUN", and "P-RUN". To
start the L3 controller normally, i.e., by turning on the power switch, position this switch to
"HALT".
This switch is used to select the operation mode of the L3 CPU module.
Key position
HALT
RUN
P-RUN
4.1.2

Duplexing Interface Module (IF719/IF728/IF748)

When the L3 controller is used in duplex configuration, it is necessary to set the primary/
secondary switch on the duplexing interface module. Before startup, confirm the switch
setting.
Primary/secondary switch (Toggle SW)
Setting
PRI
SEC
IMPORTANT
In duplex configuration, do not set both blocks of the L3 main unit for PRI or SEC; the system
will stop, resulting in error rundown.
6F8C0882
Figure 4-3 Mode Switch
Table 4-1 Function of Mode Switch
Sets the L3 CPU module in HALT mode
Sets the L3 CPU module in RUN mode
Prohibits overwriting of the memory content of the L3 CPU module in
operation with data from an engineering tool.
PRI setting
Figure 4-4 Primary/Secondary Switch
Table 4-2 Primary/Secondary Switch
The applicable CPU module operates as online module when both blocks of L3
main unit in duplex configuration are started simultaneously.
The applicable CPU module operates as standby module when both blocks of L3
main unit in duplex configuration are started simultaneously.
4.1 Confirmation of Switch Settings
Function
SEC setting
Description
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