IDEC MICROSmart FC6A Series User Manual page 187

Power Supply Precautions
When supplying the power to the CPU module, expansion interface remote slave modules, and expansion interface modules
(expander) with separate power supplies, turn the modules on and off in the order given in the following table. An error will occur
on the CPU module if the order to turn the power supply on and off is wrong.
Power Supply
ON Expansion interface module (expander) -> Expansion interface remote slave module -> CPU module order
OFF CPU module -> Expansion interface remote slave module -> Expansion interface module (expander) order
Expansion interface module (expander)
main power
Expansion interface remote slave module
main power
CPU module main power
If the order to turn on the power supply is wrong, the expansion interface modules (remote master/slave) along with the connected
expansion modules can be initialized by turning on M8320 (Initialize Expansion Interface Remote Master/Slave Modules).
Programming Example
The following program shows how to recover the operation of the system using three expansion interface remote slave modules
when the power supply to those modules are turned on in a wrong order.
Obtain the number of connected expansion interface remote slave modules.
Initialize Pulse
ANDW(W)
M8120
SFTR
If the number of connected expansion interface remote slave modules is not three,
initialize the expansion interface remote master/slave modules.
Expansion Interface
Remote Slave Module
Quantity of Modules
Initialize Pulse
LC<>(W)
D0000
M8120
ON
OFF
ON
OFF
ON
OFF
0 s 0 s
or longer or longer
Expansion Interface
Remote Master Module
Slot Info
S1 - S2 -
D8597 $0F00
Expansion Interface
Remote Slave Module
Quantity of Modules
S1 S2
D0000 0
3
FC6A S MICROS
ERIES
Order
0 s 0 s
or longer or longer
Expansion Interface
Remote Slave Module
Quantity of Modules
D1 - REP
D0000
N_B Bis
16 8
Initialize Expansion
Interface Remote
Master/Slave
Modules
S
M8320
U ' M FC9Y-B1722
MART SER S ANUAL
2: P S
RODUCT PECIFICATIONS
Obtain the number of connected expansion
interface remote slave modules from D8597
(Expansion Interface Remote Master Module
Slot Info) and store it in D0000.
Shift the value in D0000 to the right for
eight bits to obtain the number of connected
expansion interface remote slave modules.
If D0000 (the number of connected
expansion interface remote slave modules)
does not match with the actual system,
three in this example, turn on M8320
(Initialize Expansion Interface Remote
Master/Slave Modules)
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