ISO 8583 · Data fields

Field 74Credits, Number

pyiso8583 starter profilesIndependent explanation

What this field describes

The starter profiles assign this ten byte container to credits, number. It describes a count rather than a currency amount.

Confirm the reconciliation period and which events enter the count. Compare counts separately from amount totals and reversals.

Compare the two profiles

Container settings from the pinned pyiso8583 source.
Settingdefaultdefault_ascii
Value encodingASCIIASCII
Length limitExactly 10 bytesExactly 10 bytes
PrefixNoneNone

Length limits describe encoded values. They exclude any length prefix. The profiles can be customized; these settings do not establish the required fields or accepted values for a live connection.

Read the field boundary

Field 7410 bytesASCII value

Read exactly 10 value bytes. The next field begins immediately afterwards under this profile; no length prefix belongs to this field.

Find it in the bitmap

Bitmap
Secondary
Position
10
Byte
2
Bit in byte
2

Positions start at one. Bits are counted from the most significant bit of each bitmap byte. This calculation locates the field’s presence indicator, not its value.