ABB RCNA-01 User Manual download pdf (Page 274)

100

101

270 Parameter listing and descriptions

ACH550-01 User's Manual

PID controller – Advanced

The ACH550 has two separate PID controllers:

1. Process PID (PID1) and

2. External PID (PID2).

Process PID controller (PID1)

Process PID (PID1) has two separate sets of parameters:

• Process PID (PID1) set 1, defined in Group 40: PROCESS

PID SET 1, and

• Process PID (PID1) set 2, defined in Group 41: PROCESS

PID SET 2.

The user can select between the two different sets by using

parameter 4027

PID 1 PARAM SET.

Typically two different PID controller sets are being used when

the load of the motor changes considerably from one situation to

another.

External PID controller (PID2)

External PID (PID2), which is defined in Group 42: EXT / TRIM

PID, can be used in two different ways:

• Instead of using additional PID controller hardware, External

PID can be set to control a field instrument like a damper or a

valve through outputs of the ACH550. In this case, parameter

4230 TRIM MODE has to be set to value 0 (default value).

• External PID (PID2) can be used as an additional PID

controller to Process PID (PID1) to trim or fine-tune the

speed of the ACH550.

1 2 ... 269 270 271 272 273 274 275 276 277 278 279 ... 473 474

Comments to this Manuals

No comments

ABB RCNA-01 User Manual Page 274

Comments to this Manuals

Related products and manuals for Measuring, testing & control ABB RCNA-01