Siemens SIMATIC S5 Manual page 231

IP 265
((Space holder for the documentation for the
standard function counter))
What is the standard function counter?
This standard function is an IP 265 user program which was written and pretested by the Siemens
AG. In automation technology, the counting of high-speed processes is a field in itself. For this
reason, Siemens has developed a memory submodule containing a standard function called
"Counter".
Functional overview
The counter function can be used together with the IP 265 in the S5-90U, S5-95U and S5-100U
programmable controllers and in the ET 200 system (beginning revision level 2 of the IM 318-B).
The counters function completely determines the IP 265's functionality. All interfaces to the standard
program are IP 265 interfaces to the SIMATIC environment or to the process I/Os.
The standard program with the name "Counter" provides three different counting functions. These
can be subdivided in turn into two categories:
• Two 16-bit counters
The two 16-bit counters are independent of one another, and each can be operated as up
counter (normal counting function) or down counter (periodic counting function).
• One 32-bit counter
For counting functions which require considerably more scope, the two 16-bit counters can be
combined into one 32-bit counter (cascade function). The 32-bit counter is a down counter
(periodic counting function).
On the STEP 5 end, you can forward setpoints and control signals and read actual values and
diagnostic signals over the external I/O bus.
Standard package
The counters program must be ordered separately, and is supplied on an EPROM memory
submodule.
Note
The counters program has its own separate documentation. This documentation is sent
with the program, and is not included in this manual. We have, however, reserved space
in this manual for the standard function counter, and would recommend that you insert
the documentation for the counter program into the manual in the space provided.
Order Numbers
See Appendix G: "Accessories and Order Numbers"
EWA 4NEB 812 6130-02a
Standard Function "Counter"
14-1