Rockwell Automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL User Manual
Page 10
2–2
Quick Start
Publication 1746-6.18 April 1998
4.
Connect Module Output Terminals to Output Devices With Correct Bonding
Chapter 4
1746-QV Output
Terminal Block
Analog Output
(
"10v dc)
Diff.
Input
Outputs
to valves
Servo Amplifier
(Proportional)
(+)
(–)
To solenoid A
To solenoid B
A
B
+24V dc PS
0V dc PS
Do NOT connect output
shields to earth ground
2
1
0V
Important: Connect the shield of the amplifier
output cable to a 0V connection in the amplifier.
5.
Minimize Interference from Electrical Noise with Correct Shielding and Grounding
Chapter 4
Important: Connect PS output commons togerther.
Connect the following to earth ground: a) cable shields (except for amplifier outputs) at one end only,
b) input terminal 4, c) case grounds of PS and amplifier, e) LDT flange.
1746-QV
Module
LDT and Hydraulic Ram
Analog Output
Valves
Servo
Proportional
Amplifier
LDT
Signals
24V PS
"15V PS
4
earth ground
2
(–) (+)
(+) (C) (–)
Output
Input
Belden
8761
Belden
8761
Case
GND
Case
GND
Cable
Note
Cable
Note
Cable Note: Use cable
recommended by the LDT
and amplifier manufacturer.
Belden
8770
3
1
5-8
LDT
Power
Piston-type Hydraulic Cylinder and
Linear Displacement Transducer (LDT)
0V
Case
GND
2
1
Important: For correct bonding,
connect PS output commons together
and isolate from earth ground.
6.
Operate the Module for the First time
Chapter 5
After loading profiles with the ladder program (step 1), alternately run the extend profile (O:e.0/0 = 0-to-1),
then the retract profile (O:e.0/1 = 0-to-1). Modify the profile to reach the preset reference, and set it.
Important: If motion is reversed: for a
"10V dc output, change the sign (") of all extend/retract voltage
values; or for a +10V output, energize the other solenoid on the directional valve (with ladder logic).
To do this:
Enter decimal:
at address:
load all profiles
1
N7:40
set preset reference to zero
8
N7:50
clear errors
16
N7:50
read current position
read, only
N7:61
run an extend profile
1
N7:50
run a retract profile
2
N7:50