Diagnostics

payShield B2 — Echo Test

answers with B3

Echo command for connectivity test

Fields

Field	What it holds
Echo Data	Any text to echo back

Complete host messages. Each runs against the KeyLab simulator as printed. The header is four zeros here; the device echoes back whatever you send.

Echo Test

0000B20016KEYLAB ECHO TEST

4-char headercommand20 chars of fields

Opens the simulator with this command already filled in.