Information block (FPIB) for field procedures

The field procedure information block communicates general information to a field procedure.

Begin program-specific programming interface information.

The information block tells what operation is to be done, allows the field procedure to signal errors, and gives the size of the work area. It has the following formats:

Table 1. Format of FPIB, defined in copy macro DSNDFPPB
Name	Hex offset	Data type	Description
FPBFCODE	0	Signed 2-byte integer	Function code Code Means 0 Field-encoding 4 Field-decoding 8 Field-definition
FPBWKLN	2	Signed 2-byte integer	Length of work area; the maximum is 32767 bytes.
FPBSORC	4	Signed 2-byte integer	Reserved
FPBRTNC	6	Character, 2 bytes	Return code set by field procedure
FPBRSNCD	8	Character, 4 bytes	Reason code set by field procedure
FPBTOKPT	C	Address	Address of a 40-byte area, within the work area or within the field procedure's static area, containing an error message

End program-specific programming interface information.