Rockwell Automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL User Manual
Page 22
5–2
Operating the Module
Publication 1746-6.18 April 1998
Get Ready to Move the Ram
1. Turn on the +24V dc PS that powers the amplifier.
2. Turn on the hydraulic pump and “null” the ram for no movement.
3. Turn off all power supplies.
4. Connect the LDT cable and input terminal block.
5. Turn on all power supplies.
6. Be sure that you have loaded the extend and retract profiles into
the module.
7. Observe module LEDs. The RUN LED (green) should be blinking.
If not blinking, refer to troubleshooting covered last in this chapter.
Module LEDs indicate the following to assist you with the procedures:
This LED:
Is:
When the Module detects:
RUN
green
Flashing
output is at 0V dc
N
(green)
ON
profiles are loaded and output is active
FAULT
red
OFF
no internal faults
FA
(red)
Flashing
an LDT fault
ON
an internal fault
For Series A Revision A: During startup, Run LED ON and Fault LED
flashing indicate outputs are at 0V dc. During profiles, Fault LED is OFF.
8. Observe that the output image table word 0 (O:e.0) is zero.
If not zero, toggle the value of N7:50 from 0 to 16 to 0.
Reload the profiles by entering the value of 1 into N7:40.
If profiles do not reload, refer to Troubleshooting on page 5-4.
9. With the output terminal block still disconnected, run the extend
profile by changing the value in N7:50 to 1. The RUN LED should
change to ON. If not, refer to troubleshooting covered last.
Important: Reset the value in N7:50 to 0.
10.Connect the output terminal block.
Move the Ram
Important: When you set an output bit with your programming
terminal, the commanded action takes place immediately.
1. Run the extend profile by momentarily changing the value in
N7:50 to 1, and observe the direction of ram movement in N7:61.
If the ram moves in the wrong direction:
If using this type of valve and signal:
Then reverse the:
proportional valve with
"10V input
sign (
") of all voltage values and load them into the module
hydraulic motor or ac drive with 0-10V input
other solenoid on the directional valve (with ladder logic)