^HV - Host Verification

Overview

The ^HV command returns data from specified fields to the host computer, with optional ASCII header text. Used to verify field content and retrieve variable data for validation or record-keeping purposes.

Syntax

^

Parameters

• # = Field number (0-9999, default: 0)
• c = Character count (0-256, or 0-3072 in newer firmware)
• ASCII = Optional header text

Description

• Retrieves field data back to host
• Allows data verification
• Includes optional header text
• Field must have ^FN number assigned
• Returns variable data for quality control

Examples

Verify Serial Number Field

^XA
^FO50,50^A0N,30,30^FN1^FDSERIAL123^FS
^
^XZ

Returns field 1 with "SERIAL:" header.

Quality Control Verification

^

Returns first 20 characters of field 2.

Usage Notes

• Can only verify numbered fields (must have ^FN)
• Character count limit varies by firmware
• Firmware v14.4.0+ supports extended ranges
• Header text helps identify returned data
• Useful for:
  • Quality assurance
  • Data validation
  • Record-keeping
  • Print verification

Related Commands

• ^FN - Field Number
• ^FD - Field Data
• ~HS - Host Status Return

See Also

• Field Number (^FN)
• Field Data (^FD)