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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 88

Examples

Read the exception status byte from the device with address 1:

01 07 41 E2

01 Device address

07 Function code, 04 = read exception status

A typical response from the device is as follows:

01 07 03 62 31

01 Device address

07 Function code

03 Exception status byte

62 31 CRC

Request the rst 12 registers from device with address 1:

01 04 00 00 00 0C F0 0F

01 Device address

04 Function code, 04 = read input register

00 00 Starting address

00 0C Number of registers = 12

F0 0F CRC

A typical response from the device is as follows: *Note these are the older register denitions.

01 04 18 00 00 03 E8 00 00 7A 02 6C 62 00 00 41 BA 87 F2 3E BF FC 6F 42 12

EC 8B 4D D1

01 Device address

04 Function code

18 Number of data bytes = 24

00 00 03 E8 Serial number = 1000 (unsigned long)

00 00 7A 02 Totalizer = 31234 lbm (unsigned long)

6C 62 00 00 Totalizer units = “lb” (string, unused characters are 0)

41 BA 87 F2 Mass ow rate = 23.3164 lbm/sec (oat)

3E BF FC 6F Volume ow rate = 0.3750 ft3/sec (oat)

42 12 EC 8B Pressure = 36.731 psia (oat)

4D D1 CRC

An attempt to read register(s) that don’t exist:

01 04 00 00 00 50 F1 D2

01 Device address

04 Function code 4 = read input register

00 00 Starting address

00 50 Number of registers = 80

F0 36 CRC

1 2 ... 83 84 85 86 87 88 89 90 91 92 93 ... 130 131

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