3)communication – Yokogawa GC1000 Mark II Process Gas Chromatograph User Manual

Page 34

<3. Overview >

3-13

IM 11B03A03-01E

(3)Communication

DCS
communi-cation

PC
communi-cation

Transmission :

Analysis result

*4)

Calibration coefficient
Alarm

Reception :
Operation request

*5)

GCMT
(GC Maintenance Terminal)
Transmission :

Analysis result

*4)

Operation information

*6)

Parameter list

Reception :

Operation request

*5)

Change of Parameter list

Item

Signl level

No.

Description

*1) : Analysis result(concentration, simulated distillation result,

base level, signal level, noise level, Deviation calculation, Liner calculation1-5, Ratio, Separation
coefficient, Calorific value, Density, Compressive factor, Wobbe Index)

*2) : Operation request, (Stream sequence assign, Stream

(cont.) assign, Run command, Stop command, Pause command, Range change)

*3) : Operation Information(Chromatogram, Oven

temperature, measuring stream, Valve ON/OFF etc...)

T0304.EPS

Standard :

RS422 (4wires, Full-Duplex)

Specification :

Start bit 1, Stop bit 1, Parity 1, ASCII7 bit,
Without procedure or Hand shake

Speed :

1200/2400/4800/9600/19200 bps(selectable)

For explosion protection :

RS422/RS232C converter is provided.(2 wires
of power line is needed except the signal line)

The transmission type is full duplex for RS232C.