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Panasonic ST4 Instruction Manual
3.3 Emission Halt Function
53
3.3 Emission Halt Function
!
WARNING!
Do not use the emission halt input to stop machinery! This could
result in serious injury or death.
The emission halt input is incorporated in the controllers ST4-C11 and ST4-C12EX. This
function stops the emission process of the ST4-A
□
. You can select whether emission is on or
halted by wiring the terminals T1 and T2 as shown in the following table.
Between T1
and
T2
Operation
Open Emission
halt
Short-circuit Emission
During emission halt, the control output (OSSD 1/2) is off and the emission halt indicator
(orange) lights up.
If the machinery is not stopped, the cause may be a malfunction due to extraneous noise or an
abnormality in the control output (OSSD 1/2) or the auxiliary output, also from the machine.
40ms or more
120ms or more
140ms or less
40ms or more
25ms or less
Emission halt
input
Emission
condition
Reset input
ON
Emission
Emission
halt
OFF
Open
0V/+V
Open
Short-
circuit
Control output
(OSSD 1 / 2)
Time chart for manual reset
90ms or less
40ms or more
40ms or more
25ms or more
Emission
condition
Emission
halt input
ON
Emission
Emission
halt
OFF
Open
0V/+V
Control output
(OSSD 1 / 2)
Time chart for auto reset
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