Section 5: Startup and meter configuration

Reference, Installation, and Operations Manual

June 2013

3-9000-743 Rev S

 

 

RS-485 serial initial connection steps

1.Power up the Daniel Mark III Ultrasonic Gas Flow Meter meter and the PC.

2.Plug the DB-9 end of the cable directly into the PC running Daniel MeterLink. The three wires on the other end of the cable connect to J7 (Field Connection Board) for Port B. The Digital Out wire goes to J7-Pin1, the Digital In wire goes to J7-Pin2, and the COMMON wire goes to J7-Pin3.

3.Run Daniel MeterLink on the PC and create a new meter directory record with the following parameters:

a.Select Meter Type as Mark III.

4.Check the Direct box and uncheck the Modem and Ethernet boxes.

5.Click the Direct button and set the Direct connection properties for Baud Rate of 19200 and Comms Address (Modbus ID) of 32.

6.Configure the Mark III Port A for RS-485 operation use the following instructions.

a.To configure Port A for RS-485 Full Duplex operation, set the CPU board and Field Connection board switches as indicated in the table below (see Figure 3-24for switch bank locations):

Table 5-6 Serial Port A RS-485 Full duplex configuration switch settings

Board

Switch

Position

 

 

 

 

 

CPU

S3-1

RS485

 

 

 

 

 

 

S3-2

RS485

 

 

 

 

 

 

S3-3

RS485

 

 

 

 

 

 

S3-4

RS485

 

 

 

 

 

 

S5-1

FULL

 

 

 

 

 

 

S6-1

RS485

 

 

 

 

 

 

S6-2

RS485

 

 

 

 

 

Field Connection

 

Termination ON

Termination OFF

 

 

 

 

 

S1-1

TERM ON (RX)

TERM OFF (RX)

 

 

 

 

 

S1-2

TERM ON (TX)

TERM OFF (TX)

 

 

 

 

 

S1-3

FULL DUPLX

 

 

 

 

 

 

S1-4

FULL DUPLX

 

 

 

 

 

114

RS-485 serial connection setup