Honeywell UDC2500 Manuale Utente

An alarm is an indication that an event that you have configured (for example—Process 
Variable) has exceeded one or more alarm limits. There are two alarms available. Each 
alarm has two setpoints. You can configure each of these two setpoints to alarm on 
various controller parameters. 

There are two alarm output selections, High and Low. You can configure each setpoint to 
alarm either High or Low. These are called single alarms. 

You can also configure the two setpoints to alarm on the same event and to alarm both 
high and low. A single adjustable Hysteresis of 0 % to 100 % is configurable for the 
alarm setpoint. 

See Table 2-3 in the Installation section for Alarm relay contact information. 
The prompts for the Alarm Outputs appear whether or not the alarm relays are physically 
present. This allows the Alarm status to be shown on the display and/or sent via 
communications to a host computer. 

Table 3-15  ALARMS Group (Numeric Code 1100) Function Prompts 

Lower Display 

Upper Display 

A1S1TY 

 

 

 

 

 

NONE 
IN 1 
IN 2 
PROC 
DE  
OUT 
SHED 
E-ON 
E-OF 
MAN 
RSP 
FSAF 
PrRT 
DI 1 
DI 2 
BRAK 

 

 

 

 

 

0 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 

ALARM 1 SETPOINT 1 TYPE—Select what 
you want Setpoint 1 of Alarm 1 to represent. 
It can represent the Process Variable, 
Deviation, Input 1, Input 2, Output, and if you 
have a model with communications, you can 
configure the controller to alarm on SHED. If 
you have setpoint programming, you can 
alarm when a segment goes ON or OFF. 

NO ALARM 
INPUT 1 
INPUT 2 
PROCESS VARIABLE 
DEVIATION 
OUTPUT (NOTE 1) 
SHED FROM COMMUNICATIONS 
EVENT ON (SP PROGRAMMING) 
EVENT OFF (SP PROGRAMMING) 
ALARM ON MANUAL MODE (NOTE 2) 
REMOTE SETPOINT 
FAILSAFE 
PV RATE OF CHANGE  
DIGITAL INPUT 1 ACTUATED (NOTE 7) 
DIGITAL INPUT 2 ACTUATED (NOTE 7) 
LOOP BREAK (NOTE 4)