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iEM3100 / iEM3200 / iEM3300 series user manual Communications via Modbus RS-485
DOCA0005EN-04 53
DATETIME format:
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:
The following table describes the command block:
Command result
The command result can be obtained by reading registers 5375 and 5376.
The following table describes the command result:
Word
Bits
15 14 13 12 11 10 987 6543210
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 :
Year :
Month :
Day :
Hour :
Minute :
Millisecond :
WD (day of the week) :
SU (summer time) :
iV (validity of received data) :
Reserved Bit
7 bits (year from 2000)
4 bits
5 bits
5 bits
6 bits
2 octets
1–7: Sunday–Saturday
Bit to 0 if this parameter is not used.
Bit to 0 if this parameter is not valid or not used.
Slave
Number
Function
Code
Command block
CRC
Register Address Command Description
1–247 16 5250 (up to 5374)
The command is made of a command number and a set of parameters. See the
detailed description of each command in the command list.
NOTE: All the reserved parameters can be considered as any value, e.g. 0.
Checking
Register Address Content Size (Int16) Data (example)
5250 Command Number 1 2008 (Set Tariff)
5251 (Reserved) 1 0
5252–5374 Parameter n
4 (Tariff=4)
NOTE: Command number 2008 supports only
one parameter with the size of 1.
Register Address Content Size (Int16) Data (example)
5375 Requested Command Number 1 2008 (Set Tariff)
5376
Result
Command result codes:
• 0 = Valid Operation
• 3000 = Invalid Command
• 3001 = Invalid Parameter
• 3002 = Invalid Number of Parameters
• 3007 = Operation Not Performed
1 0 (Valid Operation)