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Parameter specific drivers, Database driver – Watlow LogicPro User Manual

Page 206

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Chapter 12: Function Blocks

LogicPro User’s Guide

190

Watlow Anafaze

Doc.# 28002-00 Rev 3.00

The module address is determined by the rotary switch setting on the
face of the module with the exception of the processor module which
has address zero.

The module I/O number is generally the number on the terminal to
which the I/O device is attached, but see the PPC-2000 User’s Guide
to be certain.

The I/O type in the address is a digit that indicates the type of I/O
addressed. Used when addressing I/O in modules that handle more
than one type. Table 12.7 lists the options for the I/O Type digit in
the three-place address.

Table 12.7

I/O Type Digit in IO Physical
Address

Parameter Specific Drivers

T

he parameter specific IO Drivers (Setpoint, Soft_Input,

Soft_Bool, and Soft_Int) are used to read or set values for
specific parameters. The specific parameter value is addressed
with its database offset.

The database offset is the location of a particular value
relative to the first value of that parameter. For example, to
access channel 17’s setpoint with the Setpoint IO Driver, the
IO Physical address will consist of the database offset, 17.
Table 12.8 lists the parameter specific drivers and the
corresponding database offset ranges.

Table 12.8

Addresses Used with Parameter
Specific IO Drives

Database Driver

The Database IO Driver is used to examine or set values for
any closed-loop control parameter such as Control Mode that
is not supported by one of the other drivers. The Database
driver allows access to all controller parameters. Other drivers
are provided for faster access to specific parameters. Of
course, controller parameters that are read-only cannot be
adjusted. The specific parameter value is addressed with the

Y

I/O Type

0

Digital I/O State

1

Count Value

2

Frequency Value

3

Analog Output Value

IO Driver

Database Offset

Setpoint

Channel Number (1-48)

Soft_Input

Soft Input Number (1-50)

Soft_Bool

Soft Bool Number (1-1000)

Soft_Int

Soft Int Number (1-100)