Mitsubishi FX3UC SERIES User Manual page 171

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
5.7 Pulse Catch (M8170 to M8177)
The PLC (main unit) is provided with a pulse catch function and has 8 pulse catch input points.
1. Allocation of special memories to input numbers (ON duration of input signals)
Input No.
X000
X001
X002
X003
X004
X005
X006
X007
2. Non-overlap of input numbers
The input terminals X000 to X007 can be used for high-speed counter, input interruption, pulse catch, speed
detection (SPD) instructions and general-purpose input.
Take care not to overlap the input numbers.
Example:
When the pulse catch input contact M8170 is used, X000 is occupied. Therefore, it is impossible to use C235,
C241, C244, C246, C247, C249, C252 and C254, input interruption (including delay interruption) pointers
I000 and I001 and SPD, ZRN, DSZR and DVIT instructions at the same time.
→ For details on programming, refer to the programming manual.
Contact on sequence program
M8170
M8171
M8172
M8173
M8174
M8175
M8176
M8177
5 Input Specifications and External wiring
5.7 Pulse Catch (M8170 to M8177)
→ For the wiring, refer to Section 7.3.
ON duration of input signal
5µs or more
50µs or more
1
2
3
4
5
6
7
8
9
10
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