Honeywell UMC800 Reference Guide

Function Blocks
3/99 Function Block Reference Guide 121
2.45 ON/OFF Function Block,
continued
Configuration Parameters,
continued
GENERAL
TAB, continued
Table 2-34 General Tab Configuration Parameters
Properties
Function
Parameter Index# Parameter Description Value or Selection
Block Order
N/A Execution Order
Read Only. See “Configure’ Menu,
”Execution Order” to change.
Tag Name
N/A 8-character tag name
Descriptor
N/A Block description
Control Direction
N/A Control Action
REVERSE - Proportional action
causes output to decrease as
process variable increases.
DIRECT - Proportional action
causes output to increase as
process variable increases.
SP Tracking
N/A Setpoint Tracking
NONE
TRACK PV When control mode is
“manual”, local setpoint
tracks process variable.
TRACK RSP When setpoint is
remote setpoint, local
setpoint tracks remote
setpoint.
Hysteresis
13 Output Hysteresis 0 to 10 % of input span
Start/Restart Initial Mode
N/A Control Mode and Setpoint
at NEWSTART
Newstart is the first scan
cycle following the cold
start of the controller
MAN LSP Manual control and last
local setpoint
AUTO LSP Automatic control and
last local setpoint.
AUTO RSP Automatic control and
remote setpoint.
MAN LSPonly Manual control and
local setpoint only.
AUTO LSPonly Automatic control
and local setpoint only*.
AUTO RSPonly Automatic control
and remote setpoint only*.
*These modes will override the
configured POWER UP MODE.
Power up
Mode
N/A Control Mode and Setpoint
at power up
MAN LSP Manual control and last
local setpoint
AM LSP
Same control mode
(auto or manual)
and
last local setpoint.
AM LR Same control mode
(auto or manual) and
setpoint (local or
remote) as at power-
down.
Failsafe Out
23 Failsafe Output Selection
ON
OFF
Continued next page

Honeywell UMC800 Specifications

General

Brand	Honeywell
Model	UMC800
Category	Controller
Language	English