HEIDENHAIN iTNC 530 HSCI - Connection Diagram; Emergency Stop Test

936 HEIDENHAIN Technical Manual iTNC 530 HSCI
Connection
diagram
In the event of an error, a drop-off of the control-is-ready output (-STO.A.G)
must trigger an emergency stop. The control therefore checks this output
every time that line power is switched on.
If you use safety protection combinations, this may lead to problems if the
emergency stop test is also performed with these combinations. The reason
for this is the recovery time of such assemblies after an emergency stop. In
some cases it is greater than 200 ms.
In order to maintain these specifications, the "Control is ready" output (-
STO.A.G) remains off for the time in MP7630 after detecting the 0 level at the
"control-is-ready signal acknowledgment" input (-ES.A). This time for step 5
(see flowchart) can be configured in MP7630. This time is to be set so that the
safety protection combinations can become ready again.
MP7630 Recovery time after emergency stop test can be configured
Input: 0: 200 ms
1 to 999 [ms]
Emergency
stop test
The emergency stop test was expanded for HSCI controls without functional
safety (FS). After the emergency stop test or a self-test is started, internal
signals of the HSCI participants are now tested for proper function in the first
phase. In a further, second phase the emergency stop test and brake test are
conducted with external signals (ES.A, ES.B, STO.A.G).
But it still applies, that, in the event of an error, a drop-off of the control-is-
ready output (MC.RDY or STO.A.G) always triggers an emergency stop.
Note
The circuitry recommended by HEIDENHAIN is illustrated in the Basic
Circuit Diagram.
Ensure that the control-is-ready acknowledgment occurs within 1 second.
Note
The circuitry recommended by HEIDENHAIN is illustrated in the Basic
Circuit Diagram.