Siemens SIMATIC FM 453 Manual page 206

Description of Functions
9.1.2 Checkback Signals
Overview
The checkback signals indicate the processing status of the axis and report it
to the user program.
Table 9-2 describes the checkback signals and their functions.
Table 9-2 Checkback Signals
Symbol
Significance Significance
English German
TST_STAT TFGS Sw./over P bus
interface com-
plete
OT_ERR BF/FS Operator con-
trol and guid-
ance errors
DATA_ERR DF Data error
PARA PARA Parameterize
START_EN SFG Start enable
9-6
Function Function
Communication with the user program is not possible, since the P bus
interface has been switched over for operation with the start-up tool.
... signaled to the user if an operator-control error or travel error is
pending (e.g. unallowed control signal has been set, (R+) and (R–) set
simultaneously) An error message causes the movement to be canceled.
see Chapter 11
... is reported to the user when a data error occurs.
see Chapter 11
... module parameterized. All machine data applicable for control of an
axis are present on the module.
... signals that the FM 453 is ready for positioning and output.
"Start enable" is set:
– if no static stop or error is pending and the drive enable is pend-
ing
– if the mode setting and mode checkback match (after mode
change)
– if no axis functions (including M output, dwell time) are active,
or after functions have been completed
– for further processing of a function interrupted with unpro-
grammed stop
– in Automatic mode, after program has been selected (one pro-
gram active) and after M0, M2, M30, or at end of block
with Automatic single-block
"Start enable" is deleted:
– if a function has been started and is active, or
– if a start condition is active (stat.)
– if there is an error and an unprogrammed stop
– in follow-up mode
Without Enable Start, none of the functions that can be operated
with Travel Plus, Travel Minus and Start can be executed.
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01