Connect Plc (Hard Wired Interface Version) - Graco Therm-O-Flow 200 Instructions - Parts 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 98.
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
334130L
Description
Turn on the Heat
Put the Unit in Set-
back
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
Bit High Error State Bit Low
0
0
1
1
Table 8 Output Run States
Run State
Bit High Run State Bit Low
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