Rockwell Automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL - Manual (Page 21)

Chapter
5
Publication 1746-6.18 April 1998
Operating the Module
for the First Time
This chapter outlines the steps for operating the module for the first
time with an operating hydraulic ram. We cover these steps:
•
power-up the system
•
test for proper system operation
•
troubleshoot possible problems
Starting with module and LDT power turned off, bring the system
on-line for the first time as follows (refer to I/O wiring in chapter 4):
Check Wiring and Grounding
1. Disconnect the LDT connector at the head end.
2. Disconnect both of the module’s input and output terminal blocks.
3. Turn ON the power supplies for the LDT and SLC processor, and
check the LDT connector and module input terminal block for:
•
pin 1 +15V dc
•
pin 2 PS common
•
pin 3 –15V dc
4. Observe that the module’s fault LED (red) is ON.
5. Verify NO continuity between pin 2 (PS commons) and pin 4
(shield/frame) on the module’s input terminal block.
6. Verify NO continuity between the LDT cable shield and pin 2
(PS commons) on the module’s input terminal block.
7. Verify continuity between pin 2 (PS commons) on the module’s
input terminal block and the output common on the
"15V dc PS
that powers the LDT and module.
8. Verify continuity between pin 2 (PS commons) on the module’s
input terminal block and the (–) terminal on the +24V dc PS
that powers the proportional amplifier.
9. Verify NO continuity between the +24V dc PS (–) connection
and earth ground.
10.Verify continuity between the shield of the amplifier output cable
and pin 2 (PS commons) on the module’s input terminal block.
11. Verify continuity between the cable shield (Belden 8761 or
equivalent) on the +24V dc PS and earth ground.
Chapter Objectives
Power Up the System