Status:
Power LED is out.
Channel LEDs 2X and 9 are lit; all others are out.
R
T
h
e
R command resets (opens) all channels of a given scanner card.
Example:
The command @02R opens all channels on the 53A-334 Card at function
card address 2, mainframe address 0.
Status:
Power LED is out.
Channel LEDs are out.
Readback Feature
The readback feature of the 53A-334 Card lets the user query the card
to determine which channel, i f any, is closed. When the 53A-334 Card
is addressed (power LED out) and the system controller requests input
from the 53/63 Series System, the card returns a 2 -digit number
followed by <CR><LF>. The number returned corresponds to the closed
channel (00-31). I f no channels are closed, then 40 is returned. I f the
card malfunctions (multiple relays closed), then 50 is returned. T h e
readback feature uses a third pole on each relay to detect a closed
channel in order to verify proper operation of both the drive circuitry
and the relay coil.
334 - 10