Hardy Instruments • 9440 Carroll Park Dr. • Suite 150 • San Diego, CA 92121-5201
Tel 858.278.2900 • Fax 858.278.6700 • www.hardyinstruments.com • [email protected]
Series B
HI 1746-WS
The Button
J2
Pin | Signal
16 Aux In
15 N.C
14 GND
13 +V
12 Relay 2
11 +V
10 Relay 1
9 C2-
8 C2+
7 -Exc
6 -Sen
5 -Sig
4 +Sig
3 +Sen
2 +Exc
1 Shield
FAULT
COMM
C2
WEIGH SCALE
LEDS
Run/Fault LED
Flashing
Green
Self-Test is running.
Flashing
Green
, (5Hz Flash Speed) - Self-Test Failed, or
calibration has not been completed correctly.
Steady
Green
Self-Test Passed
Flashing
Red
Weigh Scale Module has a fault.
(The load cell Millivolt signal level is out of range.)
Steady Red Module has a major problem.
Contact Hardy
Instruments Customer Support for assistance.
Comm. LED
Flashing
Green
, Block transfer is being performed.
(Normal Operation)
LED is Off, No Communication, check I/O configuration.
C2 LED
Steady
Green
, C2 load cell(s) has been found.
LED is Off, No C2 load cells have been found.
Steady
Red
, Unable to read load cell data or the Load cell
data is in error.
What do I check first?
•
Are the COMM and FAULT led green?
o
See led section above:
o
IF NO see reverse page
o
C2 led is dependent on, if the load cells are C2 enabled. (See led section above.)
•
Does the weight change increase as weight is applied?
o
Monitor the PLC screen to verify:
Simply apply weight to the scale
•
Does it return to the original weight reading or drift about and then
return to zero?
•
Is the weight correct?
•
Is the weight stable to 1:10,000?
Is the weight correct at multiple weighing stages?
Verify the load cell signal output
C2+ = gray, C2- = Violet, voltage 4.9vdc
Excitation = 5vdc
Signal range is –0.1mvdc to 15.3mvdc
Sense lines installed to the junction box or jumpers.
Shields landed to make this the single ground point
HI 1746WS System troubleshooting Quick Reference Guide
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