Siemens SIMATIC S7-200 System Manual page 335

Table 10-8 Error Values Returned by MODx_MSG and MODx_XFR Instructions
Error Description
0 No error
Telephone line errors
1 No dial tone present
2 Busy line
3 Dialing error
4 No answer
5 Connect timeout (no connection within 1 minute)
6 Connection aborted or an unknown response
Errors in the command
7 Numeric paging message contains illegal digits
8 Telephone number (Phone input) out of range
9 Message or data transfer (Msg or Data input) out of range
10 Error in text message or data transfer message
11 Error in messaging or data transfer telephone number
12 Operation not allowed (i.e. attempts set to zero)
Service provider errors
13 No response (timeout) from messaging service
14 Message service disconnected for unknown reason
15 User aborted message (disabled command bit)
TAP - - Text paging and SMS message errors returned by service provider
16 Remote disconnect received (service provider aborted session)
17 Login not accepted by message service (incorrect password)
18 Block not accepted by message service (checksum or transmission error)
19 Block not accepted by message service (unknown reason)
UCP - - SMS message errors returned by service provider
20 Unknown error
21 Checksum error
22 Syntax error
23 Operation not supported by system (illegal command)
24 Operation not allowed at this time
25 Call barring active (blacklist)
26 Caller address invalid
27 Authentication failure
28 Legitimization code failure
29 GA not valid
30 Repetition not allowed
31 Legitimization code for repetition, failure
32 Priority call not allowed
33 Legitimization code for priority call, failure
34 Urgent message not allowed
35 Legitimization code for urgent message, failure
36 Reverse charging not allowed
37 Legitimization code for reverse charging, failure
Creating a Program for the Modem Module Chapter 10
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