HEIDENHAIN iTNC 530 HSCI - External Emergency Stop -ES.A and -ES.B

932 HEIDENHAIN Technical Manual iTNC 530 HSCI
External emergency
stop -ES.A and
-ES.B
For triggering an emergency stop, controls with HSCI have the emergency-
stop inputs -ES.A and -ES.B (e.g. -ES.A (X9/7a) and -ES.B (e.g. X9/7b) on the
PL). A "0" signal at -ES.A or -ES.B triggers an emergency stop reaction with the
error message "external emergency stop." The PLC inputs I3 and I32 known
up to now are being replaced in HSCI systems by -ES.A and -ES.B.
Both emergency stop inputs -ES.A and -ES.B must be wired. Both inputs must
carry the same signal. This signal is safety related and must be generated by
the appropriate devices (e.g. dual-channel emergency stop button, safety
contactor combination).
If an external emergency stop is triggered,
 the nominal speed value "null" is transmitted, braking the drives on the
intended braking ramp (usually at the limit of current)
 the EMERGENCY STOP error message is displayed, and
 markers M4177, M4178 and M4260 are set by the NC.
You can clear the error message with CE after switching the machine control
voltage back on.
However, an external emergency stop (-ES.A, -ES.B) does not disconnect the
output -STO.A.G.
If marker M4580 is set, then instead of the external emergency stop, the
control loops of all axes and of the spindle are opened and an NC stop is
performed. If the marker M4580 is deleted when an emergency stop is
pending, the external emergency stop is released.
Maximum reaction times of the control until the response is triggered at the
input after the signal change.
Minimum required pulse width for detection by the control at the –ES.A, –ES.B
inputs: pulse width > 3 ms
Input Response period Response
–ES.A = 0 5 ms Emergency stop
–ES.B = 0
Set Reset
M4177 Clearable error message displayed NC NC
M4178 Error message EXTERNAL
emergency stop is displayed
NC NC
M4580 Suppress the emergency stop, open
all position control loops, NC stop
PLC PLC
M4260 Control-is-ready acknowledgement NC NC