User`s manual

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5-8 Motion Mate™ DSM314 for Series 90™-30 PLCs User's Manual

–

January 2001 GFK-1742A

2.01

Module Status Code

Module

Status Code

indicates the current DSM314 operational status.

When the

Module

Error

Present

%I flag is set, and the error is not related to a specific axis, an

error code number is reported in the

Module Status Code

that describes the condition causing the

error. A new

Module Status Code

will not replace

a previous

Module Status Code

unless the new

Module Status Code

has Fast Stop or System Error priority.

The

Module Status Code

word is also used to report

System Status Errors

. These are of the format

Dxxx, Exxx, and Fxxx. For details on

System Status Error

codes, refer to Appendix A.

For a list of Motion Mate DSM314 error codes refer to Appendix A.

2.02

Axis 1 - Axis 4 Error Code

The

Servo

Axis n Error Code

, where n = Axis 1 - Axis 4,

indicates the current operating status of each axis. When the

Module

Error

Present

%I flag is

set, and the error is related to a particular axis, an error code number is reported which describes

the condition causing the error. A new

Axis Error Code

will replace a previous

Axis Error Code

if it has equal or higher priority (Warning, Normal Stop, Fast Stop) compared to the previous

Axis

Error Code

For a list of Motion Mate DSM314 error codes refer to Appendix A.

2.03

Command Block Number

indicates the block number of the

command that is presently being executed in the active Program or Subroutine. It changes at the

start of each new block as the program commands are executed, and thus identifies the present

operating location within the program. Block numbers are displayed only if the motion program

uses them. Additionally, the most recently used block number will be displayed until superseded

by a new value. The

Command Block Number

is set to zero on power cycle or reset.

2.04

Commanded Position

(user units) is where the axis is commanded

to be at any instant in time. For a Servo Axis, the difference between

Commanded Position

and

Actual Position

is the

Position Error

value that produces the Velocity Command to drive the axis.

The rate at which the

Commanded Position

is changed determines the velocity of axis motion.

Commanded Position

moves past either of the count limits, it will roll over to the other limit

and continue in the direction of the axis motion.

2.05

Actual Position

(user units) is a value maintained by the DSM314 to

represent the physical position of the axis. It is set to an initial value by the

Set Position

%AQ

Immediate command or to

Home Position

by the

Find Home

cycle. When digital absolute

encoders are used,

Actual Position

is automatically set whenever the encoder reports a valid

position. The motion of the axis feedback device continuously updates the axis

Actual Position

moves past either of the count limits, it will roll over to the other limit and

continue in the direction of the axis motion.

2.06

Strobe 1, 2 Position

Strobe 1 Position

and

Strobe 2 Position

(user units) contain the axis

actual position when a Strobe 1 Input or Strobe 2 Input occurs. When a Strobe Input occurs, the

Strobe 1Flag

Strobe 2 Flag

%I bit is set to indicate to the PLC that new Strobe data is

available in the related

Strobe 1 Position

Strobe 2 Position

status word. The PLC must set the

proper

Reset Strobe 1

Reset Strobe 2

Flag %Q bit to clear the associated

Strobe 1,2 Flag

bit.

Strobe 1, 2 Position

will be maintained and will not be overwritten by additional Strobe Inputs

until the

Strobe 1, 2

Flag

%I bit has been cleared. If the

Reset Strobe Flag

%Q bit is left in the