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EKI-1331 User Manual 36
 Up to 10 users may be whitelisted.
 The first column is a telephone number, with a length ranging from 1 to 16 bytes,
and is mandatory.
 The second column is the user name, with a length ranging from 0 to 16 bytes,
and is optional.
After enabling the “Modbus to SMS” function, EKI-1331 can identify two types of
SMS commands sent by the users on the white list. The EKI-1331 performs an action
corresponding to different commands and then sends a response to the SMS user.
The SMS to inquire state
Users can send the following SMS command to inquire the EKI-1331 operating sta-
tus and the register values of the PLC.
Caution! Users can send SMS to EKI-1331 via mobile phone or SMS modem.
Two types of SMS formats and response message are as follows:
Request Response Message Description
GET
plc1 connected
plc2 disconnected
Inquire about the name and
status of all PLCs connected
to the EKI-1331.
GET plc1_name,
plc2_name… plc1 OUTPUT1=on OUTPUT2=off
plc2 OUTPUT3=on OUTPUT4=on
Inquire about the PLC vari-
ables with names of
plc1_name, plc2_name. The
plcX_names are parameter.
Users can query different PLC
variables by modifying the
plcX_name. Different PLCs
are separated by a comma.
GET plc1_name
register1 register2,
plc2_name register3
register4,…
Plc1 register1=5 register2=6
plc2 register3=1.8 register4=2.2
This command finds the value
of a variables under a PLC
named plcX_name. The
plcX_name and registerX are
parameters. Users can find
the name of corresponding
variables by trying different
perameter commands. By
entering multiple registers,
multiple variables can be
found at the same time. Differ-
ent PLCs are separated by
comma.
Request Response Message Description
ALARM
Alarm total: 55, #53 date-time
context1, #54 date-time context2,
#55 date-time context3 Find a count of historical
alarm records and return the
latest three historical alarms.
ALARM 2-3
Alarm total: 55, #2 date-time
context1, #3 date-time context2, #4
date-time context3
Inquire about historical
records within the appointed
number range. It can request
maximum of five historical
records each time.