Athena C10 line Manual de Instruções descarregar pdf (Página 19)

Co mmon

G/R

Supervisor

Device 1 Device 2 Device "n"

G = Transmitter

R = Receiver

G/R = Bi-directional (Receiver/Transmitter) buffer

Rt = Termination resistance: the transmitter can drives up to 32

receivers plus two 120 Ω resistors.

Rg = 100 Ω Resistor

From the above drawing it may be seen that a “star” connection is not

valid. Each branch would have to be terminated, which in turn would

reduce the overall the impedance of the line. In these conditions, the

signal level would be too low for reliable communications.

6.3.1 References

GOULD Gould Modbus Protocol Reference Guide

(PI-MBUS-300 Rev. B)

APRIL JbuS Specification

GLOBAL ENG. DOC. EIA STANDARD RS -485

7. C10 / M10 Controllers

7.1 Bit Zone

Address

Modbus JbuS Variable Type

0 1 - -

1 2 - -

2 3 - -

3 4 Main output condition (0 = OFF, 1 = ON) R

4 5 AL2 alarm status (0 = OFF, 1 = ON) R

5 6 AL3 alarm status (0 = OFF, 1 = ON) R

6 7 Out of range (0 = Normal operation, 1 = Safety) R

7 8 Auto-Tune (0 = OFF, 1 = Run) R

8 9 - -

9 10 Out of range (0 = Normal operation, 1 = Safety) R

10 11 - -

11 12 - -

12 13 - -

13 14 - -

14 15 - -

15 16 - -

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 106 107

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Athena C10 line Manual de Instruções Página 19