PPC-2000 User’s Guide
Chapter 5: LogicPro and Modbus Reference
Doc.# 30002-00 Rev 2.3
Watlow Anafaze
193
High Process Limit (HP Limit)
The high process alarm activates when the
Process Variable
(PV)
goes above the high process setpoint. The PV must drop to the
alarm setpoint minus the alarm deadband for the alarm to
clear. The alarm limit is set in the engineering units of the
channel. Its value does not change when the process setpoint
changes. The default high process alarm setpoint is 0.
Low Process Limit (LP Limit)
The low process alarm activates when the process variable (PV)
goes below the low process setpoint. The PV must rise to the
alarm setpoint plus the alarm deadband for the alarm to clear.
The alarm limit is set in the engineering units of the channel.
Its value does not change when the process setpoint changes.
The default low process alarm setpoint is 0.
High Deviation Offset (HD Offset)
This value determines the high deviation alarm limit relative
to the current setpoint. The high deviation alarm occurs when
the process variable is greater than the current setpoint plus
this value. The offset is set in the engineering units of the
channel but relative to the process setpoint. The alarm limit
changes when the process setpoint changes. The default high
deviation offset is 0.
Low Deviation Offset (LD Offset)
This value determines the low deviation alarm limit relative to
the current setpoint. The low deviation alarm occurs when the
process variable is lower than the current setpoint less this
value. The offset is set in the engineering units of the channel
but relative to the process setpoint. The alarm limit changes
when the process setpoint changes. The default low deviation
offset is 0.
Alarm Deadband
This parameter prevents the process and deviation alarms
from toggling on and off when the process variable is near the
alarm limit. For high alarms the deadband is below the
setpoint; for low alarms the deadband is above the setpoint. An
alarm that occurs when the process variable crosses the alarm
setpoint does not clear until the process returns within the
alarm setpoint and the deadband value. The deadband is set in
the engineering units of the channel. The default alarm
deadband is 2.
Summary of Contents for Anafaze PPC-2000
Page 2: ......
Page 14: ...Table of Contents PPC 2000 User s Guide viii Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 24: ...List of Tables PPC User s Guide xviii Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 36: ...Chapter 1 Overview PPC 2000 User s Guide 12 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 112: ...Chapter 2 Hardware Installation PPC 2000 User s Guide 88 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 184: ...Chapter 4 Troubleshooting PPC 2000 User s Guide 158 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 296: ...Chapter 7 Specifications PPC 2000 User s Guide 268 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 310: ...Appendix A Modbus Protocol PPC 2000 User s Guide 282 Watlow Anafaze Doc 30002 00 Rev 2 3...
Page 311: ...Doc 30002 00 Rev 2 3 Watlow Anafaze 283 B Appendix B Declaration of Conformity...
Page 319: ...PPC 2000 User s Guide Glossary Doc 30002 00 Rev 2 3 Watlow Anafaze 291...
Page 320: ...Glossary PPC 2000 User s Guide 292 Watlow Anafaze Doc 30002 00 Rev 2 3...