Sierra 241-VTP, 240-VTP instruction manual Appendix E Modbus Commands

Appendix E MODBUS Commands Series 24-HP Instruction Manual

gramming Output Menu’s “Modbus Units” item. The display units strings may be examined by accessing their associated registers. Each of these units string registers contain 2 characters of the string, and the strings may be 2 to 12 characters in length with unused characters set to zero. Note that the byte order affects the order in which the strings are transmitted. If the Modbus Order menu (see page 2) is set to 0-1:2-3 or 2-3:0-1, then the charac- ters are transmitted in the correct order; if set to 1-0:3-2 or 3-2:1- 0, then each pair of characters will be transmitted in reverse or- der.

Registers	Variable	Data type	Units	Function	Addresses
				code
65100-65101	Serial number	unsigned long	—	03, 04
30525-30526	Totalizer	unsigned long	display units*	03, 04	524-525
32037-32042	Totalizer units	string	—	03, 04	2036-2041
30009-30010	Mass flow	float	display units*	03, 04	8-9
30007-30008	Volume flow	float	display units*	03, 04	6-7
30005-30006	Pressure	float	display units*	03, 04	4-5
30001-30002	Temperature	float	display units*	03, 04	0-1
30029-30030	Velocity	float	ft/sec	03, 04	28-29
30015-30016	Density	float	display units*	03, 04	14-15
30013-30014	Viscosity	float	cP	03, 04	12-13
30031-30032	Reynolds number	float	—	03, 04	30-31
30025-30026	Vortex frequency	float	Hz	03, 04	24-25
34532	Gain	char	—	03, 04	4531
30085-30086	Vortex amplitude	float	Vrms	03, 04	84-85
30027-30028	Filter setting	float	Hz	03, 04	26-27

The following registers are available with the energy meter firm-

ware:

Registers

30527-30528

32043-32048

30003-30004

30011-30012

Variable

Totalizer #2 Totalizer #2 units Temperature #2 Energy flow

Data type

unsigned long string

float float

Units

display units*

—

display units* display units*

Function code

03, 04 03, 04 03, 04 03, 04

Addresses

526-527

2042-2047

2-3

10-11

E-4 IM-24-HP