Festo CAMC-G-S3 Manual page 72

2 Product description of safety module CAMC-G-S3
The request of the safety function SBC is cancelled as follows:
– by the user via a combination of different inputs on the signal VIN_SBC_CSF.
– by setting the parameter P17.03, an automatic restart is performed when the request is cancelled.
Each request of the safety function has priority over termination of the request.
This means: As long as one of the xxx_RSF (Request Safety Function) signals is pending, the safety
function cannot be terminated by an xxx_CSF (Clear Safety Function) signal.
The safety function controls the switch-off of the safe brake control via the VOUT_SBC_BRK_ON signal.
If the safety function is requested, VOUT_SBC_BRK_ON = 1.
VOUT_SBC_BRK_ON is internally linked to a control signal of the basic unit which forwards the switch­
ing status of the brake activation in the basic unit. Safe brake control is only energised when no SBC
has been requested and the basic unit enables the brake (#SH2_BRK_EN is Low).
After a request of SBC and subsequent cancellation, the safe brake control is only ener­
gised when the basic unit enables the holding brake.
This ensures that z axles with a suspended load can be restarted without the load drop­
ping.
The control signal VOUT_SBC_BRK_ON must either be switched to the internal brake activation of the
motor controller (control signal LOUT_BRAKE_CTRL, è Section B.1.4) or to a digital output for control
of an external clamping unit (LOUT_D4x, è Section B.1.4).
To use the brake activation of the basic unit at [X6] in conjunction with SBC,
configure the output "Internal brake" of the safety module:
Request:
Standard parameter:
The brake control of the basic unit is now additionally monitored using test pulses.
The motor controller detects a switch-off of the safe brake control from outside. If neces­
sary, it performs a Quick Stop and switches the output stage off. On the microcontroller
side, brake activation can also be switched on continuously (use of the parameters from
the holding brake activation in the microcontroller), so that control only takes place via
the safety module.
72 Festo – GDCP-CAMC-G-S3-EN – 1406NH – English