Alarm Value; Alarm Hysteresis - Omron EJ1 User Manual

Setting Alarm Specifications
4-4-2

Alarm Value

Note
4-4-3

Alarm Hysteresis

Note
82
(4) Set value: 5, Upper and lower-limit with standby sequence
Note For the above upper and lower-limit alarm:
• In cases 1 and 2 above, the alarm is always OFF if the hystere-
sis overlaps the upper and lower limits.
• In case 3, the alarm is always OFF.
(5) Set value: 5, Upper and lower-limit with standby sequence
• The alarm is always OFF when the hysteresis overlaps the up-
per and lower limits.
Alarm values are indicated by "X" in the table on the previous page. When the
upper and lower limits are set independently, "H" is displayed for upper limit
values, and "L" is displayed for lower limit values.
Variable
type
D0/90 Alarm Value 1 to 3
Conditions for use The alarm type must not be set to an upper and lower limit
alarm, or to an LBA.
Variable type
Alarm Upper Limit Value 1 to 3 (BANK) −1999 to 9999 EU 0
D0/90
Alarm Lower Limit Value 1 to 3 (BANK) −1999 to 9999 EU 0
Conditions for use The alarm type must be set to an upper and lower limit alarm,
upper and lower limit range alarm, or upper and lower limit
alarm with standby sequence.
Refer to 4-7-1 Bank Function for details on banks.
• The hysteresis of alarm outputs when alarms are switched ON/OFF can
be set as follows:
Upper-limit alarm
Alarm Hysteresis
ON
OFF
Alarm value
• Alarm hysteresis can be set separately for each alarm.
Variable type
E3/A3 Alarm 1 to 3 Hysteresis
Conditions for use The alarm type must not be set to 0.
This parameter can be set only when operation is stopped.
The decimal point position is determined by the sensor selection. With analog
inputs, the decimal point position is determined by the Decimal Point Position
parameter setting. In this case, however, the 0 (****) decimal point position
setting will be treated as setting 1 (***.*).
Parameter name
(BANK) −1999 to 9999 EU 0
Parameter name
Lower-limit alarm
Alarm Hysteresis
ON
OFF
Alarm value
Parameter name
(Channel) 1 to 9999 EU
Section 4-4
Setting range Default
Setting range Default
Setting range Default
2