Beckhoff TwinSAFE logic FB User Manual

Function blocks
Function blocks for TwinSAFE logic components 73
3.7.2 Signal description
Table 3-37: FB TWOHAND inputs
Name
Permitted type
Data type
Description
Twohand1
TwinSAFE-In
FB-Out
BOOL
1st input channel. The parameterization determines,
whether the input is linked to a break contact (safe
state will be requested by logical 0) or make contact
(safe state will be requested by logical 1).
Twohand2
TwinSAFE-In
FB-Out
BOOL
2nd input channel, behaves like Twohand1
If the discrepancy time is not equal 0, the 1st and 2nd
input channel are considered to be the 1st input
group and a discrepancy time monitoring is carried
out between both channels, if one of the two input
channels requests the safe state.
Twohand3
TwinSAFE-In
FB-Out
BOOL
3rd input channel or 1st input channel of the 2nd
input pair, otherwise corresponds with Twohand1
Twohand4
TwinSAFE-In
FB-Out
BOOL
4th input channel or 2nd input channel of the 2nd
input pair, otherwise corresponds with Twohand2
Table 3-38: FB TWOHAND outputs
Name
Permitted type
Data type
Description
Error
TwinSAFE-Out
FB-In
Standard-Out
BOOL
TRUE:
The discrepancy time monitoring for a two-channel
input group has detected an error. The error must
be acknowledged via the ERR_ACK input of the
corresponding TwinSAFE group
FALSE:
No error was found
TwoHandOut
TwinSAFE-Out
FB-In
Standard-Out
BOOL
1st output channel, the safe state corresponds to a
logical 0.
Table 3-39: Input and output types
Type
Description
TwinSAFE-In
TwinSAFE input, e.g. at an EL1904/KL1904
Standard-In
Standard PLC variable (output in the PLC %Q*)
FB-Out
TwinSAFE FB output
TwinSAFE-Out
TwinSAFE output, e.g. at an EL2904/KL2904
Standard-Out
Standard PLC variable (input in the PLC %I*)
FB-In
TwinSAFE FB input
Table 3-40: Internal identifier of the FB
Type
Description
FB Twohand
This description applies to BLG 1.0 (internal version number)

Beckhoff TwinSAFE logic FB Specifications

General

Brand	Beckhoff
Model	TwinSAFE logic FB
Category	Industrial Electrical
Language	English