Siemens 420 Max. value for PID feedback, Sets lower limit for the PID controller output in %

Issue 07/04 3 Functions

P2267 =...

P2268 =...

P2280 =...

P2285 =...

P2291 =...

P2292 =...

Max. value for PID feedback	100.00 %
Sets the upper limit for the value of the feedback signal in [%]
Min. value for PID feedback	0.00 %
Sets lower limit for value of feedback signal in [%]
PID proportional gain	3.000
Allows user to set proportional gain for PID controller
PID integral time	0.000 s
Sets integral time constant for PID controller
PID output upper limit	100.00 %
Sets upper limit for PID controller output in [%]
PID output lower limit	0.00 %
Sets lower limit for the PID controller output in [%]

PID

MOP

ADC

PID

FF

USS

BOP link

USS

COM link

P2254

PID

P2253 SUM

	PID
P2264
	PT1

P2257 P2258

PID

RFG

P2267

P2261

PID

PT1

P2269 P2270

PID

SCL

r2273 P2280 P2285

PID

− ∆ PID

P2291 r2294	0
	1

P2292

PIDOutput

Motor control

Example:

CB

COM link

P2200 P2265 P2268 P2271

Parameter	Parameter text	Example
P2200	BI: Enable PID controller	P2200	= 1.0	PID controller active
P2253	CI: PID setpoint	P2253	= 2224	PID-FF1
P2264	CI: PID feedback	P2264	= 755	ADC
P2267	Max. PID feedback	P2267		Adapt to the application
P2268	Min. PID feedback	P2268		Adapt to the application
P2280	PID proportional gain	P2280		Determined by optimizing
P2285	PID integral time	P2285		Determined by optimizing
P2291	PID output upper limit	P2291		Adapt to the application
P2292	PID output lower limit	P2292		Adapt to the application

NOTE

If P0971 is used to start data save from the RAM to EEPROM, then after the data has been transferred, the communications memory is re-initialized. This means that communications via USS as well as also via the CB board are interrupted for the time it takes to reset:

The connected PLC (e.g. SIMATIC S7) goes into stop

The STARTER start-up program buffers the communications failure

For the DriveMonitor start-up program, "NC" (not connected) or "drive busy" is displayed.

The "busy" text is displayed at the BOP operator panel

After reset has been completed, for the start-up programs STARTER and DriveMonitor and the BOP operator panel, communications are automatically re- established.

MICROMASTER 420	Operating Instructions
6SE6400-5AA00-0BP0	83