Panasonic ST4 Instruction Manual
3.9 Sensor Diagnosis Function (Only ST4-C12EX)
71
3.9 Sensor Diagnosis Function (Only ST4-C12EX)
The sensor diagnosis function is incorporated only in the controller ST4-C12EX. The function
checks the reception status "beam received" and "beam interrupted" of the connected ST4-A
□
as well as any other sensor fault.
If ST4-A
□
is in the status "beam received", the muting input indicator (orange) lights up.
However, if ST4-A
□
is in the status "beam interrupted" or ST4-A
□
is not connected, the muting
input indicator (orange) stays off.
Under normal operation the display shows the state of the muting input terminals S-A to S-F.
If the sensor diagnosis function is active, the display also shows the state of the sensor heads
(ST4-A
□
).
The relation between the muting input indicator (orange) and the addresses of the sensor heads
(ST4-A
□
) is as follows.
Normal operation
Active sensor diagnosis function
Setting switch
"SW 5"
Muting input
indicator
(Orange)
S-B
S-F
S-D
S-A
S-E
S-C
Address 1 (S-B)
Address 3 (S-F)
Address 2 (S-D)
Address 4 (S-A)
Address 6 (S-E)
Address 5 (S-C)
Continuous diagnosis under normal operation
While the power is on, you have to set the setting switch "SW5" to ON to activate the diagnosis
function for ST4-A
□
.
If under normal operation a power loss occurs, power is supplied when the setting switch "SW5"
is ON, the control output (OSSD 1/2) switches to OFF, and " " is indicated on the fault display
(red).
To reset the system, you have to turn OFF the power and the setting switch "SW5". Then set the
power and "SW5" to ON so that the sensor can return to the normal operation.
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