Siemens SIMATIC S7-200 System Manual page 327

Configuration Table for the Modem Module
All of the text messages, telephone numbers, data transfer information, callback numbers and
other options are stored in a Modem module configuration table which must loaded into the V
memory of the S7-200 CPU. The Modem Expansion wizard guides you through the creation of a
Modem module configuration table. STEP 7--Micro/WIN then places the Modem module
configuration table in the Data Block which is downloaded to the S7-200 CPU.
The Modem module reads this configuration table from the CPU on startup and within five
seconds of any STOP-to-RUN transition of the CPU. The Modem module does not read a new
configuration table from the CPU as long the Modem module is online with STEP 7--Micro/WIN. If
a new configuration table is downloaded while the Modem module is online, the Modem module
reads the new configuration table when the online session is ended.
If the Modem module detects an error in the configuration table, the Module Good (MG) LED on
the front of the module flashes on and off. Check the PLC Information screen in
STEP 7--Micro/WIN, or read the value in SMW220 (for module slot 0) for information about the
configuration error. The Modem module configuration errors are listed in Table 10-4. If you use the
Modem Expansion wizard to create the Modem module configuration table, STEP 7--Micro/WIN
checks the data before creating the configuration table.
Table 10-4 EM 241 Configuration Errors (Hexadecimal)
Error
0000 No error
0001 No 24 VDC external power
0002 Modem failure
0003 No configuration block ID - - The EM 241 identification at the start of the configuration table is
not valid for this module.
0004 Configuration block out of range - - The configuration table pointer does not point to V
memory, or some part of the table is outside the range of V memory for the attached CPU.
0005 Configuration error - - Callback is enabled and the number of callback telephone numbers
equals 0 or it is greater than 250. The number of messages is greater than 250. The number
of messaging telephone numbers is greater than 250, or if length of the messaging telephone
numbers is greater than 120 bytes.
0006 Country selection error - - The country selection on the two rotary switches is not a supported
value.
0007 Phone number too large - - Callback is enabled and the callback number length is greater than
the maximum.
0008 to 00FF Reserved
01xx Error in callback number xx - - There are illegal characters in callback telephone number xx.
The value xx is 1 for the first callback number, 2 for the second, etc.
02xx Error in telephone number xx - - One of the fields in a message telephone number xx or a data
transfer telephone number xx contains an illegal value. The value xx is 1 for the first
telephone number, 2 for the second, etc.
03xx Error in message xx - - Message or data transfer number xx exceeds the maximum length.
The value xx is 1 for the first message, 2 for the second, etc.
0400 to FFFF Reserved
Creating a Program for the Modem Module
Description
Chapter 10
313