Grundfos CIU 500 - Page 33

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33
12.2.2 Subscription
The GSM service providers have different technical solutions for
GPRS to choose from. You have to select the service provider
and the technical solution that best suit your system, and it must
be based on static IP addressing. You will get the following from
the GSM service provider:
• A Subscriber Identity Module (SIM card).
• An Access Point Name (APN), e.g. "Internet".
• A user name (is fixed and cannot be changed by the user).
• A password (is fixed and cannot be changed by the user).
• A static IP address.
Solutions based on a VPN (Virtual Private Network) involve the
use of special routers, e.g. GRE (Generic Routing Encapsulation)
routers, which you will also get from the service provider.
Fig. 25 Modbus TCP telegram
12.2.3 Installation
To prepare the CIU 250 for GPRS communication, some settings
have to be made via SMS commands:
• Select Access Point Name:
APN <ascii string>
This is always mandatory.
• Select Username:
USERNAME <ascii string>
The need for a user name depends on your operator and the
type of subscription.
• Select Password:
PASSWORD <ascii string>
The need for a password depends on your operator and the
type of subscription.
Some advanced GPRS settings have default values that usually
work, but in special cases, it might be necessary to change some
of them. This is also done via SMS commands.
• Select Authentication:
AUTHENTICATION <NORMAL | SECURE>
Only used by some service providers. Default value is
"Normal".
• Select Connection type:
CONNECTION <SERVER | CLIENT | DISABLE>
Default value is "Server".
• Set GPRS roaming:
GPRSROAMING: <ON | OFF>
Default value is "Off".
• Select Modbus TCP port number:
MODBUSPORT <port no.>
Default value is 502.
• Select GENIpro port number:
GENIPROPORT <port no.>
Default value is 49152. This is only relevant when using
Grundfos PC Tools.
It is possible to configure the GPRS connection with a single
multi-parameter command:
• SETGPRS <parameter 1, parameter 2, parameter 3, …>
– <parameters>:<APN>,<Modbus port>,<GENIproport>,
<username>,<password>,<authentication>,<connection>,
<GPRS roaming>
Example
SETGPRS
Grundfos.dk2.tdc,502,49888,Grundfos,4321,normal,server,off
To verify the GPRS setting after completion, the SMS command
GPRSSETTING can be used. The command GPRSSTATUS can
verify if the GPRS connection is working.
The connection states have the following meaning:
– "Detached": Trying to locate GPRS service.
– "Attached": GPRS service located.
– "Context active": IP address has been assigned, ready for a
client to establish a socket connection.
– "Connected": A client has established a socket connection.
The system is ready for TCP/IP data exchange (or already
exchanging data).
For details about the use of SMS commands, see "CIM 25X SMS
commands" (supplement to the installation and operating
instructions) on the CD-ROM supplied with the GSM module.
TM04 4907 2209
Modbus RTU telegram
Modbus TCP/IP data
Modbus application program header
Modbus TCP/IP application data unit
Slave ID
Func
code ID
Data CRC
Data
Func
code ID
Unit IDLengthProtocol IDTransaction ID