Siemens S7-1200 System Manual page 693

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Table 12- 18 Condition codes

STATUS (W#16#....)

S7-1200 Programmable controller

System Manual, 03/2014, A5E02486680-AG

Parameter type

Illegal start condition selected

Illegal end condition selected, no end condition selected

Receive interrupt enabled and this is not possible.

Maximum length end condition is enabled and max length is 0 or > 1024.

Calculated length is enabled and N is >= 1023.

Calculated length is enabled and length is not 1, 2 or 4.

Calculated length is enabled and M value is > 255.

Calculated length is enabled and calculated length is > 1024.

Response timeout is enabled and response timeout is zero.

Inter-character gap timeout is enabled and it is zero.

Idle line timeout is enabled and it is zero.

End sequence is enabled but all chars are "don't care".

Start sequence (any one of 4) is enabled but all characters are "don't care".

Communication processor and Modbus TCP

12.3 Point-to-point (PtP) communication

Specify how long to wait for the entire message to be

completely received once the first character has been

received. This parameter is only used when the message

timeout condition is selected. (0 to 65535 milliseconds)

Specify the number of bit times between characters. If the

number of bit times between characters exceeds the

specified value, then the end condition will be satisfied.

This is only used with the inter-character gap condition.

(0 to 65535 bit times up to 8 second maximum)

Sequence 1 ignore/compare control for each character:

These are the enabling bits for each character for the end

sequence. Character 1 is bit 0, character 2 is bit 1, ...,

character 5 is bit 4. Disabling the bit associated with a

character means any character will match, in this

sequence position.

Sequence 1 start characters (5 characters)