Basics On Calling Operating Modes, Settings And Commands - Siemens SIMATIC S7-300 FM 350-1 Manual

Operating Modes, parameters and commands

7.1 Basics on calling operating modes, settings and commands

7.1 Basics on calling operating modes, settings and commands
Calling operating modes, settings and commands
● You select the operating modes in the programming interfaces of FM 350-1.
● You change the operating mode or edit settings in programming interfaces. The new
● Count commands are generated using either the hardware signals wired to the front
Control and status bits in the DB
In addition to the control bits, the DB contains status bits which report the status of count and
measuring operations. The control and status bits are each allocated two bytes in the DB
(see the chapter DB Assignments (Page 169).)
Transferring the control and status bits
Status and control bits are transferred between the CPU and the module by calling
FC CNT_CTRL or FC CNT_CTL2, which must be embedded in the user program:
The control and status bits should be addressed symbolically in the user program. The
symbolic names are used in the description of FCs in this chapter.
For details on FC CNT_CTL1 or FC CNT_CTL2, refer to the chapter Programming FM 350-1
(Page 39). The DB assignments are listed in chapter DB assignments (Page 169).
84
The parameter data are saved on the PG and transferred to the rack SDB.
For information about the installation of programming interfaces and programming
FM 350-1, refer to the chapter Programming FM 350-1 (Page 35) and to the Online Help
system of the installed software.
mode or settings are applied after the next restart of FM 350-1.
connector, or by setting the relevant input parameter at FC CNT_CTL1 or with
isochronous mode FC CNT_CLT2 in the user program. The input parameters are stored
as control bits in the DB of FC CNT_CTL1.
FM 350-1 Counter module
Manual, 05/2011, A5E03648639-01