Beckhoff CX1100-09 Series, Техническая документация

Страница: 32 / 40

Commissioning
Details of linking signals are given in the documentation for the TwinCAT System Manager.
Linking the UPS control block into a PLC program:
The UPS is controlled from the PLC, with the aid of the FB_CX1000SimpleUps function block which is in the
TC CX1000System.lib. This must, however, be linked by the library administrator. If this has been done, the
block is available as a function block. It is instanced as such in the declarations part of the program.
PROGRAM MAIN_UPS
VAR
UPS : FB_CX1000SimpleUps;
END_VAR
It is then called from the program with its parameters. There are three parameters for this function block:
• bDIPDisable : BOOL;
• iDischargeLevel : USINT;
• tDelay : TIME;
"tDelay" sets the maximum retention time for which the power may be absent before the UPS switches the
PLC off. The permitted entries here are between 0 and 10 seconds. The boolean expression "bDIPDisable"
allows the setting of the rotary switch on the UPS to be ignored. If the value is "TRUE" then the value set by
"iDischargeLevel" is used as the valid retention time. The call then looks like this:
UPS(
bDIPDisable := TRUE, (* TRUE for DIP switch override *)
iDischargeLevel := 30, (* Values from 0.1, ... 9 *)
tDelay := t#5s (* Retention time before shutdown t#0s .. t#10s *)
);
In order for the function block to operate, the signals that are to be linked in TwinCAT's System Manager
must be created as variables. This is done automatically when the process image is read into the System
Manager. The linking process stores the addresses in the "TwinCAT_Configuration" file, and they are
introduced during the next call to the compiler. (A more precise description can be read in the description of
TwinCAT.) Alternatively it is possible to assign the addresses by hand. After compilation, warnings about the
CX1100-09xx 32 Version: 1.4