ABB AC500-S Safety User Manual page 224

Configuration and programming
AC500-S libraries > SafetyBlocks_PLCopen_AC500_v22.lib
This function block provides the two-hand control functionality (refer to EN 574, Section 4 Type
II).
This function block provides the two-hand control functionality according to EN 574, Section 4
Type II. If S_Button1 and S_Button2 are set to TRUE in a correct sequence, then the S_Two-
HandOut output will also be set to TRUE. The FB also controls the release of both buttons
before setting the output S_TwoHandOut again to TRUE.
Table 39: FB name: SF_TwoHandControlTypeII
Name Data type
VAR_INPUT
Activate BOOL
S_Button1 BOOL
S_Button2 BOOL
VAR_OUTPUT
Ready BOOL
S_TwoHandOut BOOL
Error BOOL
DiagCode WORD
Notes: No Reset input or Error output is required, because no test can be performed on both
switches.
Typical timing
diagram
Fig. 100: Timing diagram for SF_TwoHandControlTypeII
224
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
FALSE Safety related output signal.
FALSE: No correct two hand operation.
TRUE: S_Button1 and S_Button2 inputs are TRUE
and no error occurred. Correct two hand operation.
Ä Table 17 "General output parameters"
FALSE
on page 193
Ä Table 17 "General output parameters"
16#0000
on page 193
3ADR025091M0208, 12, en_US 2020/06/19