Description of Functions
9-54
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Error messages
The following table lists the errors that can occur in the execution of the Measure-
ment function.
Error
Significance
Travel er-
rors
The “Digital input not parameterized” error is signaled when a measurement function is
selected without a digital input having been parameterized (see Troubleshooting, Table
Operator
contr. errors
The “Measurement function undefined” error is signaled when both measuring functions
are selected (see Troubleshooting, Table 11-6, Class 2 No. 16).
Measuring
error
An erroneous length measurement is indicated by signaling back the length “
−
1.” Possible
causes include:
S
Resynchronization in the Reference-Point Approach mode while a measurement is in
progress
S
Execution of the Set Reference Point function while a measurement is in progress
S
Direction of travel at the falling edge is opposite to the direction of travel of the previous
rising edge
Measurement
−
value checkback signals
The checkback signal ME (see Section 9.1) signals the status of function execu-
tion, as follows:
“ME”
Inprocess measurement
Length measurement
0
S
the Length Measurement and Inpro-
cess Measurement functions are inac-
tive
S
with Start after a prior measurement
S
the Length Measurement and Inpro-
cess Measurement functions are inac-
tive
S
with front edge of the touch probe sig-
nal after a prior measurement
1
With the front edge of the touch probe sig-
nal (= Inprocess Measurem. is in progr.)
With the back edge of the touch probe sig-
nal (= Length Measurement is in progress)
Reading out the measured values
After performing the “Length measurement” and “In
−
process measurement” func-
tins you can read out the measured values from the FM 353 by calling the
POS_MSRM
block using the AW-DB read job, DBB43.7 (see Section 6.3.5).
The measured values read out are valid for the performed measuring process
starting from the “ME” checkback signal until the edge of the subsequent
measuring job arives.
Summary of Contents for SIMATIC FM 353
Page 22: ...Product Overview 1 12 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 32: ...Installing and Removing 3 6 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 282: ...Description of Functions 9 82 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...
Page 354: ...User Data Block AW DB B 16 FM 353 Stepper Drive Positioning Module 6ES7 353 1AH01 8BG0 ...