Mitsubishi Electric SW1DNN-WS0ADR-B, Руководство по эксплуатации

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Chapter 9
193
Logic programming – Function blocks
Parameters of the function block
Parameter Possible values
Inputs
 Single-channel
 Dual-channel equivalent
 Dual-channel complementary
Discrepancy time 0 = disabled, 10 to 30,000 ms in 10 ms steps. If enabled, the value
has to be greater than the logic execution time.
Number of outputs  1 (Enable output)
 2 (Enable output and Discrepancy error output)
Use fault present  With
 Without
For further information on the behaviour of this function block please refer to Section
9.9.2.
9.9.5 Magnetic switch
Function block diagram
General description
The internal logic of the Magnetic switch function block corresponds to the functionality
of the Emergency stop function block, only with a limited parameter selection. The
function block allows graphic differentiation in accordance with the application.
The Magnetic switch function block is a predefined function block for reed switches or
other sensors for which discrepancy time monitoring is required. When the evaluation
of the complementary inputs is High, the
Enable output is High (see Section 9.9.2).
Parameters of the function block
Parameter Possible values
Inputs  Dual-channel equivalent
 Dual-channel complementary
Discrepancy time 10 to 3000 ms in 10 ms steps. The value has to be greater than the
logic execution time.
Number of outputs  1 (Enable output)
 2 (Enable output and Discrepancy error output)
Use fault present  With

Without
Table 83:
Parameters of the
Emergency stop function
block
Figure 180:
Function block diagram for
the Magnetic switch function
block
Table 84:
Parameters of the Magnetic
switch function block