Functions Which Control The Fm; Fc Inc_Mod; Brief Description Of The Mode Fcs; Start Commands For The Operating Modes - Siemens SIMATIC FM 351 Installation Manual

Programming the FM 351
6.2
Definition
6
Requirements
Start Commands
6-10

Functions which Control the FM 351

In the FM 351 programming package there are functions which you can call
as required for all operating modes.
Table 6-4
Function

FC INC_MOD

FC REF_MODE
FC JOG_MODE
Take note of the following requirements which must be satisfied when calling
the FCs:
The functions may only be called in the cyclic program.
Always only one operating mode per channel may be called and be ac-
tive.
When using a number of channels, call the function for each channel sep-
arately.
All necessary data and setpoint values must be present in the FM 351 or
in the channel DB before calling.
A number of start commands are available depending on the operating mode.
The possible selection depends on the parameterization and the type of axis
which you want to operate.
Basically, the commands for operating the FM 351 have the following mean-
ing:
Table 6-5
Commands
START
DIR_M
DIR_P
STOP
Information about the possibilities and any restrictions on calling operating
modes can be found in Chapter 9 of this manual.

Brief Description of the Mode FCs

Brief Description of the Task
The incremental mode is the standard mode for the FM 351. You
can approach predefined targets in the working range with this
mode.
You synchronize the axes with the seek-reference-point mode.
With jogging you move the drive in a certain direction for the
duration of the key pressure.

Start Commands for the Operating Modes

Starts the present operating mode; the direction is determined by
the FM 351.
Starts the present operating mode in the negative direction.
Starts the present operating mode in the positive direction.
Terminates the present operating mode.
Meaning
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02