Daniel 3818 LNG Liquid Ultrasonic Meter Installation Manual

Section 3: Electrical installation

3-9000-771 Rev A

May 2012

 

 

 

Table 3-2 CPU Module labeling and LED functions

CPU Module labeling

Function

Switch position indicator or LED

and LED functions

 

 

 

 

WRITE PROT.

•

Write-protect mode - with switch in the ON

Switch position

 

 

position (default setting) protects configuration

• ON - (default setting) enables write-

 

 

and firmware overwrites.

 

protection of the configuration and

 

• To write configuration changes or download

•

firmware

 

 

firmware to the meter change the switch to the

OFF - enables writing configuration

 

 

OFF position

 

changes or downloading firmware

 

 

 

 

DHCP

•

Dynamic Host Protocol Server - enables you to

Switch position

 

 

communicate with a Daniel meter that is not

• ON - the meter is enabled to act as a

 

 

connected to a network.

 

DHCP server for a single DHCP client

 

• When the CPU Module switch is in the ON

• OFF - disables the DHCP server

 

 

position, the meter is enabled to act as a DHCP

 

 

 

 

server for a single DHCP client connected to the

 

 

 

 

Ethernet port using a crossover cable. This should

 

 

 

 

be used for peer to peer connections only.

 

 

 

• When the connection is made, select to use the

 

 

 

 

Meter Name in the meter instead of the Meter

 

 

 

 

Directory Name in order to keep all log files and

 

 

 

 

configurations separate from each meter.

 

 

 

 

 

 

PORT A

•

PORT A override - RS-232 serves as an override

Switch position

 

 

during meter commissioning to establish com-

• ON - enables RS-232 PORT A override

 

 

munications and in the event the user cannot

•

OFF - (default setting) disables

 

 

communicate with the meter due to an inadver-

 

RS-232 PORT A

 

 

tent communication configuration change. The

 

 

 

 

override period is for two minutes

 

 

 

•

Supports:

 

 

 

 

- auto-detected ASCII (Start bit 1, Data Bit 7,

 

 

 

 

Parity Odd/Even, Stop Bit 1)

 

 

 

 

- RTU (Start Bit 1, Data Bit 8, Parity none, Stop

 

 

 

 

Bit 1).

 

 

 

 

- Modbus protocols

 

 

 

•

RS-232 Baud rate=19,200

 

 

 

•

Modbus ID=32

 

 

 

 

 

MEAS

System color indicates metrology mode

LED status

 

•

Acquisition mode

•

Red flashing LED

 

 

 

• Solid red the Acquisition Module not

 

•

 

 

communicating with the CPU Module

 

Measurement mode

•

Green flashing LED

 

 

 

 

 

PWR

•

3.3V Power Indicator

•

Solid Green

 

 

 

 

 

LED 4

•

Not used

 

 

 

 

 

 

 

LED 5

•

Not used

 

 

 

 

 

 

RX

•

RX signal (Port A for RS485 or RS232

• Flashing green (when receiving data)

 

 

communication) receiving data

 

 

 

 

 

 

TX

•

TX signal (Port A for RS485 or RS232

• Flashing green (when transmitting

 

 

communication) transmitting data

 

data)

 

 

 

 

 

LINK

•

ETH1Link user Ethernet connection

•

Solid green

 

 

 

 

 

CPU Module labeling and LED indicators

43