Omron CQM1H - 08-2005, Руководство по эксплуатации

Страница: 293 / 299

273
c100 c001
0100 0098
Write the AT start code “CF00” to the output word of the relevant loop and con-
firm that the input word will become CF00.
c100 c001
CF00 CF00
Set SP to 100
°
C again.
c100 c001
0100 0098
To cancel auto-tuning, use the code “CF01” instead and follow the above proce-
dure.
Note 1. To put the Temperature Control Unit into expansion mode, change the jump-
er pin on the side of the Unit from 2 and 3 to 1 and 2.
2. Auto-tuning is not available if the half period exceeds 9999 s (approximately
2 hours 45 minutes). If the half cycle exceeds 9999 s, no measurement is
possible and the Temperature Control Unit will restart auto-tuning automati-
cally.
3. If the output word data is left as CF00, auto-tuning will be repeated. Be sure
to return it to the set value.
3-6-1 Manual Settings (Expansion Mode)
When the Temperature Control Unit is turned ON, the SP will be allocated to the
output word and the PV will be allocated to the PV word. By changing the con-
tents of the allocation, the following six set values can be read or written.
Parameter Setting range Unit Default Remarks
Set point –999 to 9,999
°
C/
°
F 0 ---
Proportional band 0.1 to 999.9
°
C/
°
F 40.0 ---
Integral time 0 to 3999 Seconds 240 ---
Derivative time 0 to 3999 Seconds 40 ---
Hysteresis 0.1 to 999.9
°
C/
°
F 0.8 ---
Control period 1 to 99 Seconds 2 When SW1-6 is set to ON, the value can be changed.
In this case, the default is “2.”
Input shift value –99.9 to 999.9
°
C/
°
F 0.0 ---
Process value –999 to 9,999
°
C/
°
F --- Read-only
Manipulated variable 0.1 to 100.0 % --- Read-only
Status --- --- --- Read-only
AT (Expansion Mode)
Section 3-6