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3 input communication block (ic) – Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) Algorithms, Tables and Sequential Logic Functions User Manual

Page 25

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Logic Functions - Book 2

INPUT COMMUNICATION BLOCK

8-17

8.3

INPUT COMMUNICATION BLOCK (IC)

The input communication block is used to receive data from the output communication block,
or output communication block channel for MOD 30 controllers and recorders, or another
instrument on the ICN via communication messages. The block specifies the source, data
type, and whether quality is to be received with the data. It also has the capability of receiving
other MOD 30 data types and storing the data as a MODCELL data type; for example,
continuous may be received and floating point stored. A mode switch is available so that the
data being received can be ignored, and allow an operator to manually change the data.
Finally, two diagnostics are provided. One diagnostic (source diagnostic) is provided to detect
a configuration error within either the block or within an Output Communication block in
another instrument. The other (timeout diagnostic) is provided to detect a break in the
communications that has halted the continual flow of data from the source.

Block outputs are the data and data quality and diagnostic errors and error quality. A
functional block diagram of a input communication block is shown in Figure 8-7. Displays used
to configure the Input Communication block are shown in Figures 8-8 through Figure 8-10.

ASCII or

HEX

Input Data

Quality

MANUAL

AUTO

Data

Source

Bad Inputs

Accepted

(YES)

BAD

GOOD

Quality Check

State (RUN,
HOLD, OFF,

DEBUG)

Continuous

Port

Number

Occurrence

Number

NO

YES

Receive

Quality

Instrument

Number

Top

Bottom

Maximum
Field Size

(1-126)

Range

OR

All others

Diagnostic

Group

(None, 1 - 7)

Not Receiving

Data (Enab/Supp)

Receiving

Unexpected Data

(Enab/Supp)

Diagnostic

Errors

Data

Type

TO:

Diagnostic

Errors

Result

Result Quality

Error Quality

Error Count

Active Errors

Unacked Errors

Mode

Figure 8-7. Functional Block Diagram, Input Communication Block