Mitsubishi Electric MELSEC FX3U - 24.4 FNC188 - CRC; Cyclic Redundancy Check

619
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
24 Others – FNC181 to FNC189
24.3 FNC186 – DUTY / Timing Pulse Generation
21
FNC160-FNC169 Real Time Clock Control
22
FNC170-FNC179 External Device
23
FNC180 Alternate Instructions
24
FNC181-FNC189 Others
25
FNC190-FNC199 Block Data Operation
26
FNC200-FNC209 Character String Control
27
FNC210-FNC219 Data Operation 3
28
FNC220-FNC249 Data Comparison
29
FNC250-FNC269 Data Table Operation
30
FNC270-FNC274 Ex-Device Inverter Comms
3) The counted number of scans is stored in either one among D8330 to D8334 in accordance with the
timing clock output destination device .
The counted number of scans stored in either one among D8330 to D8334 is reset when the counted
value reaches "n1+n2" or when the command input (instruction) is set to ON.
4) When the command input is set to ON, the operation is started. The timing clock output destination
device is set to ON or OFF by END instruction.
Even if the command input is set to OFF, the operation is not stopped.
In the STOP mode, the operation is suspended. When the power of the PLC is turned OFF, the operation
is stopped.
5) When "n1" and "n2" are set to "0", the device is set to the following status:
Related devices
Caution
• DUTY (FNC186) instruction can be used up to 5 times (points).
It is not permitted, however, to use the same timing clock output destination device for two or more
DUTY (FNC186) instructions.
Errors
An operation error is caused in the following cases; The error flag M8067 turns ON, and the error code is
stored in D8067.
• When "n1" and/or "n2" is less than "0" (error code: K6706)
• When any device other than M8330 to M8334 is set to (error code: K6705)
Timing clock output destination device
Scan counting device
M8330 D8330
M8331 D8331
M8332 D8332
M8333 D8333
M8334 D8334
n1/n2 status
ON/OFF status
n1 = 0, n2 ≥ 0
Fixed to OFF
n1 > 0, n2 = 0
Fixed to ON
Device Name Description
M8330 Timing clock output 1
Timing clock output in DUTY (FNC186) instruction
M8331 Timing clock output 2
M8332 Timing clock output 3
M8333 Timing clock output 4
M8334 Timing clock output 5
D8330
Counted number of scans for
timing clock output 1
Counted number of scans for timing clock output 1 in DUTY (FNC186)
instruction
D8331
Counted number of scans for
timing clock output 2
Counted number of scans for timing clock output 2 in DUTY (FNC186)
instruction
D8332
Counted number of scans for
timing clock output 3
Counted number of scans for timing clock output 3 in DUTY (FNC186)
instruction
D8333
Counted number of scans for
timing clock output 4
Counted number of scans for timing clock output 4 in DUTY (FNC186)
instruction
D8334
Counted number of scans for
timing clock output 5
Counted number of scans for timing clock output 5 in DUTY (FNC186)
instruction
D
D
D
D
D
D
D
D
D