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Understanding the Features
3--3
Indicator Lamp and Pushbutton Operations
Once the panel is configured and connected to the PLC, reading a pushbutton’s status is
done by reading the appropriate PLC register bit. The pushbutton normally appears in PLC
ladder logic as a contact.
When configured for PLC operation, you must write a 1 to the register bit (L1--L6) to
turn on the corresponding lamp. The OP--406 will automatically retrieve the register
data and light any lamp whose bit is set.
The X+1 register contans the flash control bits. The lamp will flash only if both the
LED bit is set and the flash control bit is set.
The lamp flash is approximately 0.5 seconds on and 0.25 seconds off.
NOTE:
A lamp must be turned on in order for the flash control bits to work.
Normally the LED inset in each pushbutton indicates the status of the pushbutton.
However, if the panel is configured for LED Separation, the LED can be set directly
from the PLC, by writing a 1 to its register bit (B1--B4). The OP--406 will automatically
retrieve the register data and light any LED whose bit is set.
Reading
Pushbutton Status
Turning on a Lamp
Flashing a Lamp
Turning on the
Inset LED
