Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter User Manual download pdf (Page 56)

Rev. 8/02 -3.18- TFXM

When one of the relays is set to TOTALIZE mode, an entry of

TOT MULT must be programmed to establish the accumulated

flow volume that needs to pass before the relay will “pulse”.

The relay will pulse every time that volume is accumulated.

The pulse has a duration of approximately 50mSec. Enter a

value using the same units that were established as Engineer-

ing Units TOTAL on page 3.12.

When a relay is set to FLOW mode, two entries must be made:

ON and OFF. The ON and OFF entries dictate at what volu-

metric flow rate (using the volumetric units established as Engi-

neering Units RATE and RATE INTERVAL on page 3.12) the

relay turns ON and at what flow rate the relay turns OFF - es-

tablishing a deadband. For “fail-safe” mode, the ON setting

should be set higher than the OFF setting.

When a relay is set to SIG STR mode, the relay will activate

when the measured Signal Strength falls below the Signal

Strength Cutoff setting. See page 3.26.

When a relay is set to ERROR mode, the relay will activate

when any error occurs in the flow meter that has caused the

meter to stop measuring reliably. See the Appendix of this

manual for a list of potential error codes.

Integral RS485 Communications

RS485 MO — MODE

SLAVE

MASTER

RS485 BA — BAUD RATE

1200

2400

9600

19200

ADDRESS — Device Address

1-127

PART 3 - KEYPAD CONFIGURATION

Batch/Totalizer

Relay

Signal Strength

Alarm

Error Alarm

Relay

Flow Rate Relay

RS485

MODBUS

Communications

4. AUX COMM MENU -- RS485

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Dynasonics TFXM Series Ultrasonic Multi-Channel Flow Meter User Manual Page 56

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