Set-Point Processing; Set-Point Gradient / Ramp - WEST 8800 Operating Manual

Configuration level

4.3 Set-point processing

The set-point processing structure is shown in the following picture:
WEST 8800
Xeff
Internal set-point
°C
°F
Process Controller
Programmer
SP. E
external
set-point
SP. 2
2nd
set-point
Index:
Ü : int/ext-setpoint switching
* : configuration SP. F n
Ö : SP SP. 2 / switching

4.3.1 Set-point gradient / ramp

To prevent set-point step changes, parameter
to a maximum rate of change. This gradient is effective in positive and negative
direction..
With parameter r. S P set to OFF (default), the gradient is switched off and
set-point changes are realized directly.
(for parameter: see page48 )
Set-point processing
Ü
0
+
8
1
+
Ü 9
The ramp starts at process value with the following switchings:
- int / ext-setpoint switching
- SP SP. 2
- Manual-/ Automatic switching
- at power on
Limiting
*
SP. H i
SP. L o
/ switching
set-point
r
48
Ramp
Ö
Effective
r. S P
set-point
- LED
r. S Pcan be adjusted
r
8800 process controller