Pepper-computer Modular Computers RS485 User Manual download pdf (Page 318)

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SMART I/O User’s Manual

October 01, 1996

Page 6- 36

Chapter 6 Communications Modules

6.2.13 ISaGRAF Programming

6.2.13.1 The ISaGRAF Board Parameters

Because this module has not been defined as a physical board in the

ISaGRAF project, it has been created as a function block as shown in

figure 6.2.13.1.1.

Figure 6.2.13.1.1 Function block of the SM-SSI Module

Command

One of:

FB_SSI_INIT This is the command that must be executed to

initialize the module before operating the SSI

interface - normally at the beginning of an

ISaGRAF program cycle. Also, prior to using

this call, if the ctrlx variables have been

defined with a value, then these will be sent to

the SM-SSI Module.

FB_SSI_SETPOINT This gives the user the possibility to enter a

value for the comparator register when testing

for a match between the actual read-back

value and the desired value. The compare

value should be defined prior to using the call.

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