Mitsubishi MELSEC-WS series, Руководство пользователя

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Chapter 4
52
Connecting devices
Type IIIC
At Type IIIC two pairs of antivalent inputs (NO/NC contact pairs of the two two-hand
buttons) are monitored.
A valid input signal is only generated if the ON state (High/Low level) exists at both
inputs within a period of 0.5 s (synchronous change, both two-hand buttons pressed)
and if both were in the OFF state (Low/High level) beforehand.
Function Notes
Tested Possible
Series connection/
cascading Not possible
Discrepancy time Possible: 0-500 ms
See Two-hand control type IIIC function block in the logic in the
CPU module with which these inputs are to be evaluated.
Synchronization time Fixed Value: 500 ms
See Two-hand control type IIIC function block in the logic in the
CPU module with which these inputs are to be evaluated.
Further information is available in the manual of the two-hand control.
4.1.5 Safety mats and bumpers
The contact symbols in this chapter show the switching status while the safety mat or
bumper is not pressed.
Electrical connection: Example from Setting and Monitoring Tool with WS0-XTIO
Pressure-sensitive short-
circuiting switching mats in
4-wire technology, connected
to test output Channel 1: Contact between X1 and I1
Channel 2: Contact between X2 and I2
Function Notes
Parallel connection Possible
Ensure that the switch off condition is sufficient!
The duration of the switch off condition of safety mats and bumpers must be at least
as long as the greatest value for the “test period” of both used test outputs to ensure
that the switch off condition is detected and that no sequence error occurs.
Further information is available in the manual of the safety mats.
Table 28:
Functions with two-hand
control unit typeIIIC
Note
Note
Table 29:
Connection of safety mats
Table 30:
Function of safety mats
ATTENTION
Note