IDEC MICROSmart FC6A Series, User Manual

Page: 148 / 578

2: P
RODUCT
S
PECIFICATIONS
2-118 FC6A S
ERIES
MICROS
MART
U
SER
’
S
M
ANUAL
FC9Y-B1722
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.
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.
Power Supply Order
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 remote slave module
main power
CPU module main power
ON
OFF
ON
OFF
Expansion interface module (expander)
main power
ON
OFF
0 s
or longer
0 s
or longer 0 s
or longer
0 s
or longer
S
M8320
M8120
ANDW(W) S1 -
D8597
Expansion Interface
Remote Master Module
Slot Info Expansion Interface
Remote Slave Module
Quantity of Modules
Expansion Interface
Remote Slave Module
Quantity of Modules
S2 -
$0F00
REP D1 -
D0000
Initialize Pulse
M8120
Initialize Pulse
SFTR S1
D0000
S2
0
Bis
8
N_B
16
Expansion Interface
Remote Slave Module
Quantity of Modules
LC<>(W)
D0000 3
Initialize Expansion
Interface Remote
Master/Slave
Modules
Obtain the number of connected expansion interface remote slave modules.
If the number of connected expansion interface remote slave modules is not three,
initialize the expansion interface remote master/slave modules.
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)