Installation and Startup
3-13
With
the PLC configured for a 4WX/4WY
, SF module in Slot #1 with the
above values loaded; the
MODULE
GOOD
and
RUN
LEDs
on the module front
panel should be lighted.
NOTE: If LEDs blink, refer to T
able 3-4. Should any fail codes occur (except
for the factory test jumper),
the
module should not be used.
T
able 3-4
Module Fail Codes
Number
of Blinks
Module Good
Pgm/Run
Error/Failure Condition
LED LED
C
**
0 Illegal
machine configuration
0 1
Analog/digital conversion
0 2 T
imer failure
0 3
Internal RAM failure (not used)
0 4
External RAM (LSB and MSB)
0 5
External RAM (LSB)
0 6
External RAM (MSB)
0 7
SFIC RAM
0 8
ROM checksum failure
0 9
Digital/analog conversion
0 10
Analog/digital conversion
1* 1
Factory test jumper
* Both
LEDs blink if factory test jumper is in place. T
o correct, remove shorting block from
two pins labeled E100 located near bottom edge of circuit board (see Figure 3-5).
**
Module good LED blinks continuously
.
NOTE:
When implementing RLL to enter a zero followed by a Start Cycle
command to WY8, note that a delay equivalent to one PLC scan time is
required between consecutive commands for communications overhead. This
delay is often provided by the number of interlocks employed. T
o avoid
mis-operation, use a timer or interlock to ensure this delay is always
present. An interlock can be provided by having RLL check WX1 for a zero
value before sending a start cycle command.
The module expects the linear positioners feeding the position information
to its input channels to read zero or near
-zero volts when the clamp is closed
and the ram is forward. When the clamp is open and the ram is retracted, a
reading of
≈
10 V is expected (32000-count in the PLC V
-memory). Suggested
(unscaled) values are contained in T
able 3-5.
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