Function blocks
72 Function blocks for TwinSAFE logic components
3.7 The function block TWOHAND
3.7.1 Functional description
The FB TWOHAND implements two-hand control. Both input groups must be actuated simultaneously to
switch the output. Repeated setting of the output is only possible if both input groups were not actuated at
the same time.
Each input group can be configured as a single-channel input, two-channel input or two-channel input
with discrepancy time monitoring. In addition, time monitoring up to 2500 ms between the two input
groups can be defined.
Each input can be configured as break contact (NC) or make contact (NO).
Figure 3-27: TWOHAND function block
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