Siemens SIMATIC FM 453 Manual page 203

9.1.1 Control Signals
Overview
The axis is operated and controlled by means of control signals.
Table 9-1 describes the control signals and their functions.
Table 9-1 Control Signals
Symbol
Name Name
English German
TEST_EN TFB Sw./over
P-bus in-
terface
OT_ERR_A BFQ/ Ac-
FSQ knowl-
edge op-
erato/tar-
vel error
START ST Start
STOP STP Stop
DIR_M R– Direction
minus
DIR_P R+ Direction
plus
ACK_MF QMF Ac-
knowl-
edge M
function
READ_EN EFG Read-in
enable
SKIP_BLK SA Skip
block
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
Interrupts communication with the user program, and switches over the P bus
interface for operation with the start-up user interface.
... resets an error message. Before acknowledging the error, correct its cause.
... starts movement in Automatic, MDI and Reference-point approach modes.
... interrupts movement or processing of the program.
... cancels reference point approach.
... moves axis in negative direction.
In Jogging and Control modes, moves axis in negative direction (level-
dependent).
Starts movement in negative direction in Incremental relative and Refer-
ence-point approach modes.
Specifies direction of movement for rotary axes in MDI and Automatic
modes.
... moves axis in positive direction.
In Jogging and Control modes, moves axis in positive direction (level-
dependent).
Starts movement in positive direction in Incremental relative and Refer-
ence-point approach modes.
Specifies direction of movement for rotary axes in MDI and Automatic
modes.
... only "acknowledge-driven" during M function output (see machine data
list in Table 5-5, MD32).
... acknowledges receipt of M function. Program sequence can be continued.
... prevents read-in (processing) of the next block.
... has effect only in Automatic mode.
The read-in enable is required in order to read in the next traversing block
during program execution.
... skips identified blocks in the program.
... has effect only in Automatic mode.
Description of Functions
Function Function
9-3