Mitsubishi MELSEC-F FX2N-1RM-E-SET, User Manual

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BFM Assignment 7
7-11
FX
2N
-1RM-E-SET Programmable Cam Switch
7.3 Cautions on creation of a sequence program
When the ON/OFF angle of the FX
2N
-1RM is set using a program in the PLC main unit, a
watchdog timer error may occur if many settings are performed at a time.
When a large value is written to D8000 while setting is performed using the initial pulse, a
watchdog timer error may also occur because such a written value becomes valid only when an
END instruction is given.
It is recommended to write the ON/OFF angle data after one operation cycle from the initial pulse
as shown in the program below.
All the buffer memories (BFM) of the FX
2N
-1RM accommodate 16-bit data.
When reading or writing data from the PLC main unit, use 16-bit FROM/TO instructions.
(If 32-bit instructions ([D] FROM/[D] TO) are used, instructions are executed using 32-bit data for
the specified BFM No. and the consecutive BFM No.)
M1
TO K0 K1000 K0 K1
M8002
Turned on after
one operation
cycle from
modification of the
watchdog timer.
~
MOV K300 D8000
Modifies the watchdog timer to "300 ms".
M1
END
Initial
pulse
Writes "0 degree" to BFM #1000
(bank 0, Y0, STEP 0, ON angle).