Emerson MRLDS Specifications download pdf (Page 13)

MRLDS Gateway MRLDS Modbus Version (809-101x) • 7

4.2.6 Modbus Output

See Table 4-3 below for Modbus registers in the

MRLDS Unit. Baud rate: 19,200; each byte is 8 (eight)

bits with no parity and 2 (two) stop bits.

4.3 MRLDS Gateway

4.3.1 MRLDS Gateway Setup on

I/O Network

Modbus versions of the MRLDS must be connected to

the 810-3040 MRLDS Gateway. The MRLDS Gateway

can be mapped in either of two ways: it can be set up on

I/O Net as an IRLDS application or as a 16AI board.

Select by setting the Gateway’s dip switch #5 to the OFF

or ON position (Figure 4-6).

4.3.2 Gateway Connections

Up to 12 MRLDS units may be connected to the Gate-

Figure 4-5

- MRLDS Termination (Inside Lower Left of Cover)

Name

PDU

Address

Logical

Address

Range

Fault and

Module

State

0x0000 1 Under Range

2 (msb)

Under Volt-

age 8 (msb)

Temperature

10 (msb)

Lamp Fail

40 (msb)

Test Mode

80 (msb)

Warm Up

Complete

0 (Lsb)

Cal/Setup

2 (Lsb)

Table 4-3

- RS485 Output Specifications

J5J4 J3

J2 J1

Termination

jumper

Factory

Mode

4 (Lsb)

Trouble

Mode

8 (Lsb)

Gas

Number

0x0001 2 0 to 40

Gas Con-

centration

0x0002 3 -20 to 1050

(PPM)

Gas

Numbers

R-22 = 6

R-404A = 27

R-134a = 15

Figure 4-6

- I/O Network Modes

Table 4-3 - RS485 Output Specifications

SELECT I/O NET MODE

OFF = IRLDS

ON = 16AI

ON = 16AIOFF = IRLDS

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 21 22

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Emerson MRLDS Specifications Page 13

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