6 Parameters
6 - 48
E5@C Digital Temperature Controllers User’s Manual (H174)
oreV
Direct/Reverse Operation
• "Direct operation" refers to control where the manipulated variable is increased when the
process value increases. Alternatively, "reverse operation" refers to control where the
manipulated variable is increased when the process value decreases.
alt1
Alarm 1 Type Alarm 1 must be assigned.
alt2
Alarm 2 Type Alarm 2 must be assigned.
alt3
Alarm 3 Type Alarm 3 must be assigned.
alt4
Alarm 4 Type Alarm 4 must be assigned.
• Set the alarm type independently for each alarm in the Alarm 1 to 4 Type parameters in
the Initial Setting Level.
• The alarms that can be set are listed in the following table.
• You can use an LBA (12) only for alarm 1. You cannot use an LBA on a
Position-proportional Model.
• If the Controller is equipped with HB/HS alarm detection, the Alarm Type 1 is not
displayed for the default settings. To use alarm 1, set an output assignment to alarm 1.
(Refer to 4-6-3 Assigned Output Functions (Assigning Control Outputs Is Not Supported
for Position-proportional Models.).)
Set
value
Alarm type
Alarm output operation
Description of function
When alarm value
X is positive
When alarm value
X is negative
0 Alarm function OFF Output OFF No alarm
1 Upper- and
lower-limit
*1
*2 Set the upward deviation in
the set point for the alarm
upper limit (H) and the
lower deviation in the set
point for the alarm lower
limit (L). The alarm is ON
when the PV is outside this
deviation range.
2
(default)
Upper-limit Set the upward deviation in
the set point by setting the
alarm value (X). The alarm
is ON when the PV is higher
than the SP by the
deviation or more.
Setting
Setting range Default
or-r: Reverse operation, or-d: Direct operation or-r
ON
OFF PV
LH
SP
ON
OFF
X
SP
PV