6 data formats, Data formats, Section – Rice Lake 820i Programmable Indicator/Controller - Installation Manual User Manual

Page 100: 96). see, Character is, A, k, p, r, i, n, t

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96

820i

Installation Manual

10.6 Data Formats

Continuous Output Serial Data Format

If continuous transmission is configured for a serial

port (STREAM parameter set to LFT or INDUST on

the SERIAL menu), the

820i

sends data using the

Consolidated Controls serial data format shown in

Figure

10-1:

<STX> <POL> <wwwwwww> <UNIT> <G/N> <S> <TERM>

ASCII 02

decimal

Polarity:
<space> = Positive

<–> = Negative

Weight: 7 digits, right-justified, dummy

zeroes, decimal point with no leading
zeroes except for leading zero immediately
preceding the decimal point. Leading

zeroes transmitted as spaces.

L = pounds
K = kilograms
T = tons
G = grains
<space> = grams

O = ounces

G = Gross

N = Net

Status:
<space> = valid

I = Invalid
M = Motion
O = Over/under range

<CR> <LF>

or <CR>

Figure 10-1. Continuous Output Serial Data Format

Demand Output Serial Data Format

When demand mode is configured for the serial port

(STREAM parameter set to OFF), the

820i

uses a data

string formatted for a basic ticket printout. The

particular ticket format printed depends on the

indicator configuration.
You can customize the ticket to work with a wide

variety of printers, scoreboard displays, and other

remote equipment. See Section 6.0 on page 54 for

more information on custom print formats.

RS-485 Data Formats

Two-wire RS-485 communications is available on

port 4 of the CPU board; four-wire RS-485

communications is supported on the “A” ports of any

installed serial expansion cards.
The

820i

has a built-in RS-485 software protocol

which is enabled when you assign a non-zero address

to the indicator. Valid RS-485 addresses must be in the

range 1–255; the address is specified on the

ADDRESS parameter on the SERIAL menu.
All remote commands are initiated using the data

format shown in Figure

10-2:

<STX> <ADDRESS> <COMMAND> <CR>

ASCII 02

decimal

Address of the

r eceiving indicator

EDP serial command

NOTE: Host must send <CR>, not

<CR><LF>. Failure to use <CR>

renders all indicators unable to
respond to serial commands

ASCII

13 decimal

Figure 10-2. RS-485 Send Data Format

If the initiating device address matches the port address

of an

820i

on the RS-485 network, that indicator

responds. For example, with demand outputs, or in

response to a KPRINT command, the responding

indicator uses the format shown in Figure

10-3:

<STX> <ADDRESS> <DEMAND DATA> <ETX> <CR>

ASCII 02

decimal

Addr ess of the

transmitting indicator

Response commands from
indicator:
< first line > <EOL>
< additional lines > <EOL>
< last line > <EOL>
where EOL = <CR> or <CR> <LF>

(set by TERMIN parameter on the
SERIAL menu)

ASCII 13

decimal

ASCII 03

decimal

Figure 10-3. RS-485 Respond Data Format

Example:

To send the KPRINT command from an

ASCII terminal to an indicator at address 65 (decimal)

on the RS-485 network, use the format shown in

Figure

10-2.

• The keyboard equivalent for the start-of-text

(

STX

) character is

CONTROL-B

.

• The indicator address (65) is represented by an

upper case “A”.

• The carriage return (CR) character is generated

by pressing the

ENTER

key.

Therefore, to send the KPRINT command to the

indicator at address 65, enter the following at the

terminal:

CONTROL-B

, A, K, P, R, I, N, T,

ENTER

.

The indicator responds with the format shown in

Figure

10-3:

<STX> A

SCALE #1

<EOL>

GROSS 1699 LB<EOL>
08/20/1998 10:05 AM<EOL>

<ETX> <CR>

If continuous transmission is configured for the serial

port, the

820i

sends data using the data format shown

in Figure

10-4:

Response commands from
indicator:
<STX> <POL> <wwwwwww>
<L/K> <G/N> <S> <EOL>
NOTE:
This is the Consolidated

Controls continuous data format

<STX> <ADDRESS> <STREAM DATA> <ETX> <CR>

ASCII 02

decimal

Address of the

transmitting indicator

ASCII 13

decimal

ASCII 03

decimal

Figure 10-4. RS-485 Continuous Data Format

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