Omron E5CC User Manual

4 - 39
4 Basic Operation
E5@C Digital Temperature Controllers User’s Manual (H174)
4-11 Alarm Hysteresis
4
4-11-2 Alarm Latch
• The alarm latch can be used to keep the alarm output ON until the latch is canceled regardless of the
temperature once the alarm output has turned ON.
Any of the following methods can be used to clear the alarm latch.
• Turn OFF the power supply. (The alarm latch is also cleared by switching to the Initial Setting
Level, Communications Setting Level, Advanced Function Setting Level, or Calibration Level.)
• Use the PF Key.
• Use an event input.
For details on setting the PF Key, refer to 5-18 Setting the PF Key. For details on setting events, refer to
5-4 Using Event Inputs.
 Summary of Alarm Operation
The following figure summarizes the operation of alarms when the Alarm Type parameter is set to
"lower-limit alarm with standby sequence" and "close in alarm" is set.
Parameters
* * = 1 to 4
4-11-2 Alarm Latch
Display Parameter Description Level
alh
*
Alarm 1 to 4 Hysteresis Alarm Initial Setting Level
rest Standby Sequence Alarm Advanced Function
Setting Level
ON
PV
OFF
Alarm type: Lower-limit alarm with standby sequence
Alarm value
Alarm hysteresis
Time
Standby sequence
canceled
Alarm
Output OFF (open)
ON (closed)

Omron E5CC Specifications

General

Number of Display Digits	4 digits
Number of Control Outputs	1
Control Method	ON/OFF
Input Type	Thermocouple, RTD, Analog voltage, Analog current
Supply Voltage	100 to 240 VAC
Output Type	Relay, Voltage, Current
Display Type	LCD
Size	48 x 48 mm
Mounting Method	Panel mount
Control Output	Relay, Voltage, Current
Alarm Output	Relay
Communication	RS-485
Ambient Operating Temperature	-10 to 55°C
Ambient Operating Humidity	25% to 85% RH
Protection Rating	IP66