5-151
J11 to J13
PID Control (Select alarm output, Upper level alarm (AH) and Lower level alarm (AL))
The inverter can output two types of alarm signals (absolute-value and deviation alarms) associated with PID control if the
digital output signal
PID-ALM
is assigned to any of the programmable, output terminals with any of E20 through E24 and
E27 (data = 42).
J11 specifies the alarm output types. J12 and J13 specify the upper and lower limits for alarms, respectively.
Select alarm output (J11)
J11 specifies one of the following alarms available.
Data for J11
Alarm
Description
0
Absolute-value alarm
While PV < AL or AH < PV,
PID-ALM
is ON.
1
Absolute-value alarm (with Hold)
Same as above (with Hold)
2
Absolute-value alarm (with Latch)
Same as above (with Latch)
3
Absolute-value alarm (with Hold and
Latch)
Same as above (with Hold and Latch)
4
Deviation alarm
While PV < SV - AL or SV + AH < PV,
PID-ALM
is ON.
5
Deviation alarm (with Hold)
Same as above (with Hold)
6
Deviation alarm (with Latch)
Same as above (with Latch)
7
Deviation alarm (with Hold and Latch)
Same as above (with Hold and Latch)
SV: PID process command PV: PID feedback amount
Hold:
During the power-on sequence, the alarm output is kept OFF (disabled) even when the monitored quantity is within
the alarm range. Once it goes out of the alarm range, and comes into the alarm range again, the alarm is enabled.
Latch: Once the monitored quantity comes into the alarm range and the alarm is turned ON, the alarm will remain ON
even if it goes out of the alarm range. To release the latch, perform a reset by using the
key or turning the
terminal command
RST
ON. Resetting can be done by the same way as resetting an alarm.
Upper level alarm (AH) (J12)
J12 specifies the upper limit of the alarm (AH) in percentage (%) of the feedback amount.
Lower level alarm (AL) (J13)
J13 specifies the lower limit of the alarm (AL) in percentage (%) of the feedback amount.
The value displayed (%) is the ratio of the upper/lower limit to the full scale (10 V or 20 mA) of the feedback
amount (in the case of a gain of 100%).
Summary of Contents for FRENIC-MEGA
Page 36: ...2 6 Unit inch mm Refer to Section 2 3 3 9...
Page 356: ...MEMO...
