Connect Plc (Hard Wired Interface Version) - Graco Therm-O-Flow 200 Instructions-Parts List Manual

Connect PLC (Hard Wired
Interface Version)
A PLC can control and monitor all items shown in the
Customer Digital Inputs and Outputs shown on the
Diagnostics screen. See Appendix A - ADM, page 103.
When the PLC has control of the system:
• Functionality is restricted from the ADM
• Automatic crossover is disabled. Rely on the PLC
and machine state indicators to know when to
cross over using the I/O.
Table 5 Customer Input
Signal No. Unit A
1 Heat On Request
2 Setback Request
3 Pump On Request Turn on the Pump
4 PLC Control
Request (input
applies to primary
unit A only)
Table 6 Customer Output
Signal No. Unit A or B
1 Run State Bit Low
2 Run State Bit High See Run State
3 Error State Bit Low See Error State
4 Error State Bit High See Error State
334130W
Description
Turn on the Heat
Put the Unit in
Setback
Control the primary
and secondary TOF
systems from the
PLC instead of the
ADM
Description
See Run State
Chart
Chart
Chart
Chart
Table 7 Output Error States
Error State Error State Bit
Bit High Low
0
0
1
1
Table 8 Output Run States
Run State
Run State Bit Low
Bit High
0
0
1
1
NOTE: All outputs are normally open when power is off.
For error (alarm) output, the contacts close when an
alarm occurs. For all others, contacts close.
NOTE: The TOF system ships with two screw terminal
connectors that plug into MZLP connectors H1 and H2.
Connectors are located in a bag on the inside of the
Electrical Enclosure. To replace the connectors, order
kit 24P176.
1. Turn Main Power Switch OFF.
2. Open the Electrical Enclosure door.
3. Route I/O cables through strain relief.
4. Remove power from the PLC.
5. Connect the PLC to connectors H1 and H2.
0 Machine is good,
no errors are
present
1 Active Unit Drum
Low
0 Active Unit Drum
Empty
1 Alarm Present in
System
0 Pump Off/ Heat Off
1 Pump Off/ Heat On
0 Pump Off/ Heat At
Temp
1 Pump On/ Heat At
Temp
Setup
25