Instruction Manual

mxCONTROL Type 8620
Page 117
The internal timer counting the period of the maximum control output will be reset if the control output
is smaller than the maximum control output and the alarm has not yet been triggered. The maximum
output is determined by the parameter "Upper output limit Lim+".
The Maximum Output Timercan be enabled/disabled through the configuration. For a general
description of the MOT refer to chapter
14.1.5.
Processdata and Data Logging
Display-Presentation Displayed data
Abbre-
viation
(menu)
Full
Screen
Trend
chart
Line
Data-
Log.
Notes
Process value PV
x x x x
Set point SP
x x x
Set point vs. Process value SP/PV
x
Module output CMD
x x x
Alarm Maximum Output Timer
x x
displayed only, if MOT
enabled and expired;
Data log in Module
output
Parameter (Code Level: Operator)
Parameter
Abbrevia-
tion
(menu)
Value range
Default values
(after successful down-
load of Cfg-File)
Sample Time Tsample 0.05/0.1 … 60.0 s 0.2 s
Set point SP
Scal- …Scal+ of the assigned input
SPLim- ... SPLim+ (if SP Limit is enabled)
Scal- +
((Scal+ - Scal-) /2)
Deadband Dbnd 0 … 100.0 % of input range 1.0 %
Set point ramp SP Ramp
Set point ramp SP Ramp Yes / No No
Ramp rise: max. positive
SP change per minute (*)
D+ 0.1 … 99999 pH/min 1 pH/min
Ramp rise: max. negative
SP change per minute (*)
D- 0.1 … 99999 pH/min 1 pH/min
Controller
Gain/amplification factor Kp 0.001 … 9999.0 (in % / unit) 10.0
Reset time Tn 0.1 … 9999.0 s 300.0 s
Lower output limit Lim- 0.0 … Lim+ 0.0%
Upper output limit Lim+ Lim- … 100.0 % 100.0 %
Safety output value CMDsafe 0.0 … 100.0 % 0.0 %
Maximum output timer (MOT)
Maximum output time (**) +Tm 1 ... 10800 s 10800 s
(*) will be only displayed if the parameter “SP Ramp” is set to “Yes”
(**) will be only displayed if the parameter “MOT” is configured as “Yes” in the menu „Configuration“
The pH controller output will be overridden with 0 % until the operator acknowledges the alarm
message with the soft key buttons in the process data menu, even if operation mode was
changed.