MX2N series HMI PLC all in one programming manual
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The input X000~X007 cannot be reused. For example, once C251 is used, X000
and X001 are occupied, so C235, C236, C241, C244, C246, C247, C249, C252, C254
and interrupt input pointers *I00, *I01 and corresponding input SPD instructions
cannot be used.
6.2 High speed count input instructions
1) Maximum response frequency of C251 C252 C254 (AB phase): 60KHz;
2) Maximum response frequency of C253 C255 (AB phase): 60KHz;
3) Maximum response frequency of C235 C241 C244 C238 (single phase): 60KHz;
4) Other high-speed counter’s highest response frequency: 10KHz;
5) High speed counter of the AB phase can be set to 2 times and 4 times frequency
(setting is valid only for OUT drive same cycle):
** When M8196-ON, C251 C252 C254 count pulse is 2 times frequency;
**When M8197-ON, the C253 C255 count pulse is 2 times frequency;
** When M8198-ON, C251 C252 C254 count pulse is 4 times frequency;
**When M8199-ON, C253 C255 count pulse is 4 times frequency;
For example: If you use an AB phase encoder, it is 1024 pulse inputs in one turn. If
not set the frequency multiplier, then adjust the counter count 1024 (the original
FX1N does not support frequency multiplier, but the FX3U can set 4 times frequency),
If you set 2 times the frequency, then turn the counter to count 2048; if you set 4
times, then turn the counter to count 4096.
Usage instruction:
No Multiplier
2 Times Frequency
4 Times Frequency
** Other usage are consistent with the original FX1N, see the FX programming manual for
details;
** If high-speed input function is not selected, Then SPD, external interrupt, and C235~C255
high-speed counter cannot be used normally.
