Parameter Information - Emerson 2202 Advanced User's Manual

Commander sk series ac variable speed drive for 3 phase induction motors from 0.25kw to 110kw, 0.33hp to 150hp

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Parameter

Introduction

x.00

description format

3.2

Parameter information

3.2.1

Parameter x.00

Pr x.00 (not Pr 0.00) in every menu is used for storing parameters. The range of this parameter is 4000 and the special codes used are as follows:

1000

Save parameters

1070

Option reset

3.2.2

Parameter types

There are two fundamental types of parameters in the drive, read only (RO) and read/write (RW). The read only parameters cannot be changed by

the user and are there to give the user useful information about the state of the drive. Read/write parameters are for the user to set up the way in

which the drive operates.

Parameters can be further broken down into Bit parameters and Non-bit parameters. Bit parameters are two state only (0 or 1) and if RW are used as

switches or two state input variables to the drive logic, or if RO indicate various drive conditions which are either true (1) or false (0). Non-bit

parameters have more than two values the range of each being given in the following descriptions.

In the basic parameter set, some parameters are represented as strings rather than numeric values which give a more informative indication of the

parameter setting.

Since the parameters in the basic parameter set are copies of extended parameters, the strings are indicated as well as the numeric value. Setting-up

via the serial interface requires numeric data.

Most parameters when being adjusted take immediate effect, but destination and source parameters do not. Using these parameter values while they

are being adjusted could cause a malfunction in the operation of the drive if an intermediary value were taken during the adjustment. For the new

value of one of these parameters to take effect a 'Drive Reset' must be carried out (see section 3.2.4 Drive reset ).

Any changes made to parameters over the serial interface are not stored in the drives EEPROM until a manual store is initiated.

3.2.3

32 bit parameters

Menu 4

Pr 4.01

Pr 4.02

Pr 20.21

Pr 20.22

Menu 20

Pr 20.26

Pr 20.27

NOTE

Menu 20 parameters cannot be displayed on the drive's LED display. Source and destination parameters cannot be set to 32 bit parameters.

Parameters Pr 4.01, Pr 4.02 and Pr 4.17 are special cases and can be used as a source.All routing within the drive is 16 bit.

If a counter in SyPTLite has a 32 bit output and this output is routed to a drive parameter, for example Pr 1.21, when the count reaches the set range

of Pr 1.21, the value in Pr 1.21 will be frozen until the counter value is reset or falls below the set range.

3.2.4

Drive reset

A drive reset is required for a number of reasons:

•

To reset the drive from a tripped state

•

To initiate loading of default parameters

•

To implement a change in the value of certain parameters

•

To initiate the saving of parameters in EEPROM

The later two of these can be done while the drive is running.

The drive can be reset in one of four ways:

1. The drive will be reset with a 0 to 1 transition of the enable input when the drive is tripped, such that a dedicated reset terminal is not required.

2. The drive will be reset when a 0 to 1 transition of the Drive Reset parameter Pr 10.33. This parameter is provided for control by a programmable

digital input such that a terminal can be used to reset the drive.

3. The Stop/Reset key. If the drive is not in keypad mode and the 'always stop' parameter is not set, then the key has a drive reset function only. In

keypad mode or if the 'always stop' parameter is set, a drive reset can be done while the drive is running by holding the Run key while the Stop/

Reset key is activated. When the drive is not running the Stop/Reset key will always reset the drive.

4. By the serial interface. This drive reset is triggered by a value of 100 being written to the User trip parameter Pr 10.38.

3.2.5

Storing drive parameters

When the keypad is used to edit a parameter, the parameter is stored when the mode key is pressed after adjustment has been made.

When using the serial interface, parameters are stored by setting Pr x.00 (not Pr 0.00) to a value of 1000 and performing a 'Drive reset'. Because a

'Drive reset' causes the values of certain parameters to be implemented, storing parameters has the effect of implementing all new values as the

store takes place.

Commander SK Advanced User Guide

Issue Number: 9

Parameter