ABB AC500-S Safety User Manual page 367

4.6.6.15 SF_EnableSwitch
Standards Requirements
IEC 60204-1, Ed. 9.2.6.3: Enabling control (see also 10.9) is a manually activated control function inter-
5.0: 2003 lock that:
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Enabling control shall be so arranged as to minimize the possibility of defeating, for
example by requiring the de-activation of the enabling control device before machine
operation may be reinitiated. It should not be possible to defeat the enabling function
by simple means.
10.9: When an enabling control device is provided as a part of a system, it shall signal
the enabling control to allow operation when actuated in one position only. In any other
position, operation shall be stopped or prevented.
Enabling control devices shall be selected that have the following features: ...
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EN 954-1: 1996 5.4 Manual reset
ISO 12100-2: 4.11.4: Restart following power failure/spontaneous restart
2003
The SF_EnableSwitch FB evaluates the signals of an enable switch with three positions.
The SF_EnableSwitch FB supports the suspension of safeguarding (DIN EN 60204 Section 9.2.4) using
enable switches (DIN EN 60204 Section 9.2.5.8), if the relevant operating mode is selected and active. The
relevant operating mode (limitation of the speed or the power of motion, limitation of the range of motion)
must be selected outside the SF_EnableSwitch FB.
The SF_EnableSwitch FB evaluates the signals of an enable switch with three positions (DIN EN 60204 Sec-
tion 9.2.5.8).
The S_EnableSwitchCh1 and S_EnableSwitchCh2 input parameters process the following signal levels of
contacts E1 to E4:
30.03.2017
when activated allows a machine operation to be initiated by a separate start con-
trol, and
when de-activated – initiates a stop function, and – prevents initiation of machine
operation.
for a three-position type:
– position 1: off-function of the switch (actuator is not operated);
– position 2: enabling function (actuator is operated in its mid position);
– position 3: off-function (actuator is operated past its mid position);
when returning from position 3 to position 2, the enabling function is not activated.
Configuration and programming
AC500-S Libraries > SafetyBlocks_PLCopen_AC500_v22.lib
AC500-S 367