Schneider Electric iEM3100 Command interface overview, Command request, Command result

iEM3100 / iEM3200 / iEM3300 series user manualCommunications via Modbus RS-485

DATETIME format:

Word	Bits
	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
1	Reserved (0)								R4 (0)	Year (0 – 127)
2	0				Month (1 – 12)				WD (0)			Day (1 – 31)
3	SU (0)	0		Hour (0 – 23)					iV	0	Minute (0 – 59)
4	Millisecond (0 – 59999)
R4 :						Reserved Bit
Year :						7 bits (year from 2000)
Month :						4 bits
Day :						5 bits
Hour :						5 bits
Minute :						6 bits
Millisecond :						2 octets
WD (day of the week) :						1–7: Sunday–Saturday
SU (summer time) :						Bit to 0 if this parameter is not used.
iV (validity of received data) :						Bit to 0 if this parameter is not valid or not used.

Command interface

Command interface overview

The command interface allows you to configure the meter by sending specific command requests using Modbus function 16.

Command request

The following table describes a Modbus command request:

Slave		Function		Command block	CRC
Number		Code	Register Address	Command Description
				The command is made of a command number and a set of parameters. See the
1–247	16		5250 (up to 5374)	detailed description of each command in the command list.	Checking
				NOTE: All the reserved parameters can be considered as any value, e.g. 0.

The following table describes the command block:

Register Address	Content	Size (Int16)	Data (example)
5250	Command Number	1	2008 (Set Tariff)
5251	(Reserved)	1	0
			4 (Tariff=4)
5252–5374	Parameter	n	NOTE: Command number 2008 supports only
			one parameter with the size of 1.

Command result

The command result can be obtained by reading registers 5375 and 5376.

The following table describes the command result:

Register Address		Content	Size (Int16)	Data (example)
5375	Requested Command Number		1	2008 (Set Tariff)
	Result
	Command result codes:
5376	• 0 = Valid Operation		1	0 (Valid Operation)
	• 3000 = Invalid Command
	• 3001	= Invalid Parameter
	• 3002	= Invalid Number of Parameters
	• 3007	= Operation Not Performed

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