Rockwell Automation 1746-QV,D17466.18 OPEN-LOOP VELOCITY CONTL - Manual (Page 25)

5–5 Operating the Module
Publication 1746-6.18 April 1998
Bit #: Description: (for error & fault bits 0-8, status of 0 = OK, status of 1 = fault.)
12 The module sets this bit after it stores retract position setpoints or voltage values,
or when retract profile is active. It remains set until another operation is performed.
13 The module sets this bit after it stores your position setpoints.
It resets it after you reset the “program position” bit (O:e.0/5 or O:e.0/7)
14 The module sets this bit after it stores your voltage values.
It resets it after you reset the “program voltage” bit (O:e.0/6 or O:e.0/8)
15 The module sets this bit when it detects the profile is active (output is applied).
Troubleshooting Table
If you observe this condition: Try this solution: Refer to this part of the manual:
Sensor signal (N7:61)
has wrong sign (
).
1. Change direction bit (Ge:5/15) and re–download. a) Enter values in G file, page 3-3.
b) Move the Ram, step 3, page 5-3.
ha wrong ign .
2. Calibrate the sensor at opposite end of cylinder. Re-do Jog Ram to Reference, pg 5-3.
After download, sensor values do not
match values in N7:61 before download. After axis calibration (preset ref = set, and N7:50 = 8),
you must upload and save SLC data files in the PC. none
Module rejects pre-set reference when
N7
i toggled fro to 8 to .
1. Pre-set Ref in G file must be within profile range. Enter values in G file, page 3-3. Module re ect pre- et reference when
N7:50 is toggled from 0 to 8 to 0.
2. N7:40 must = 0 when setting N7:50 = 8. Re-do Jog Ram to Reference, pg 5-3.
Profiles will not load into the module. 1. Each profile setpoint must be within sensor’s range. Verify full-scale count in Ge:4, page 3-3. Profile will not load into the odule.
2. Clear any errors by toggling N7:50 (0 to 16 to 0) Prior to step 8 in Get Ready to Move Ram.
3. N7:40 must = 0 when setting pre-set reference
with N7:50 = 8. Jog Ram to Reference, step 5, pg 5-3.
Unable to initiate extend/retract profiles. Write ladder rung for extend profile, another for retract.
Each must include appropriate permissives to enable
a MOV instruction with Source (1 = extend, 2 = retract)
and Destination = N7:50. none
Conditions That Control Module Outputs
The module is designed to control its outputs as follows:
The module is designed to: When these conditions are satisfied:
apply profile voltages
to the output all of the following:
– valid extend and retract profiles are stored in the module
– the “stop profile” bit (O:e.0/2) is reset.
– a “run profile” bit (O:e.0/0 or O:e.0/1) is set
retain its outputs
in last state any of the following:
– loss of backplane power (
"15V dc PS remains applied)
– loss of sensor (LDT)
– SLC mode change or LDT fault (G:e:0/13 = 0)
turn OFF its outputs any of the following:
– LDT position exceeded the setpoint farthest from LDT head
– loss of
"15V dc PS
– the “disable output” bit (O:e.0/2) is set
– SLC mode change or LDT fault (G:e:0/13 = 1)