ABB AC500-S Safety User Manual page 227

4.6.4.9 SF_TwoHandControlTypeIII
Standards Requirements
EN 574:1996 Clause 4, Table 1, Type III A; B; C.
5.1 Use of both hands / simultaneous actuation.
5.2 Relationship between output signal and input signals.
5.3 Completion of the output signal.
5.6 Reinitiation of the output signal.
5.7 Synchronous actuation.
6.2 Use of DIN EN 954-1 category 1.
6.3 Use of DIN EN 954-1 category 3. (Can only be realized by NO and NC switches together
with antivalent processing)
6.4 Use of DIN EN 954-1 category 4. (Can only be realized by NO and NC switches together
with antivalent processing)
ISO 12100-2:2003 4.11.4: Restart following power failure/spontaneous restart
This function block provides the two-hand control functionality (refer to EN 574, Section 4 Type
III. Fixed specified time difference is 500 ms).
This function block provides the two-hand control functionality according to EN 574, Section 4
Type III. If S_Button1 and S_Button2 are set to TRUE within 500 ms and in correct sequence,
then the S_TwoHandOut output is also set to TRUE. The FB also controls the release of both
buttons before setting the output S_TwoHandOut again to TRUE.
Table 42: FB name: SF_TwoHandControlTypeIII
Name Data type
VAR_INPUT
Activate BOOL
S_Button1 BOOL
S_Button2 BOOL
VAR_OUTPUT
Ready BOOL
2020/06/19
Initial value Description, parameter values
FALSE Ä Table 16 "General input parameters" on page 192
FALSE Variable.
Input of button 1 (for category 3 or 4: two antivalent
contacts)
FALSE: Button 1 released.
TRUE: Button 1 actuated.
FALSE Variable.
Input of button 2 (for category 3 or 4: two antivalent
contacts)
FALSE: Button 2 released.
TRUE: Button 2 actuated.
Ä Table 17 "General output parameters"
FALSE
on page 193
3ADR025091M0208, 12, en_US
Configuration and programming
AC500-S libraries > SafetyBlocks_PLCopen_AC500_v22.lib
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