Display Data StreamChapter —6
288 TE 2000
5250 Terminal Emulation Programmer’s Guide
S MSR
MSR enables the scanner for an input field.
S SLP
SLP is accepted, but ignored.
S Transparency
Transparency defines a field that can contain data of any value.
S Self-Check
Self-check on the controller provides additional integrity for data entry.
All field types can be specified for self-checking. The following require-
ments must be met when specifying a f ield for self-checking:
S An FCW must be defined for the field. Hex B1A0 selects Modulus
10 checking, and hex B140 selects M odulus 11.
S Field lengths for checking are restricted to 33 positions. For signed
numeric fields, only 32 positions can contain digits and the sign is
not checked. If more than 33 characters are given a LUSTAT param-
eter error r esults.
Self-check resolves fields and conditions as follows:
S The f unction converts nonnumeric characters (including nulls and
blanks) by using the four low-order bits from their EBCDIC repre-
sentation when the low-order bits are in the range 0-9. For example,
A in EBCDIC is C1, thus A = 1. R in EBCDIC is D9, thus R = 9.
A “0” replaces all other characters with the four low-order bits in the
rangeofAthroughF.Forexample,%isEBCDIC6C,thus%=0.
Null and blank characters also convert to 0. All high-order nulls,
zeros,andblanksinafieldareconvertedto0anddonotaffectthe
value of the check number.
S An all-null field checks correctly. This field can result when the oper-
ator unsuccessfully tried to enter digits into a field and checking fails.
The controller enables the operator to exit the field from the first
position by using the Field Exit key.
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