MCS MCS-Magnum User Manual

8
1.4. Troubleshooting Lost I/O Communication Problems
9
Start
Is TX I/O light
on the Magnum
blinking?
Locate expansion
board where TX
LED is not blinking
Does board
have power?
Replace fuse. If fuse
blows again, replace
expansion board
Ac input
fuse blown?
No
Yes
Replace expansion
board
Yes
Check wiring to ac
input block
No
No
Verify that MCS I/O
termination jumper is
on first and last board
only
On Magnum board,
turn power off, swap
chips U12 and U13,
turn power back on
No
Yes
Does TX light on
at least ONE
expansion board
blink?
Yes
Yes
On Magnum board,
turn power off, swap
chips U12 and U13,
turn power back on
Does TX light on at
least ONE
expansion board
blink?
No
Chip that was in
U12 is defect
Yes
Replace Magnum
board
No
Verify that address
jumpers on all
expansion boards are
set correctly
Turn power
off to
Magnum for
10 seconds,
turn power
back on
Does TX I/O light
on the Magnum
blink now?
Magnum was locked
up due to momentary
power dip or spike
Troubleshooting Lost I/O
Communication Problems
Magnum Micro Controller Systems
Replace Magnum
board
No
Yes
Does TX I/O light
on the Magnum
blink now?
Chip that was in
U12 is defective
Verify that MCS I/O
wiring between boards
is correct, especially
polarity

MCS MCS-Magnum Specifications

General

Brand	MCS
Model	MCS-Magnum
Category	Controller
Language	English