Справочное Руководство для Intermec 1555

This communication interface is used to control the product remotely from the host 
system.  shows the interactions between the components and the setup and interactive 
command modes.

When the product is communicating in unpacketed RS232 format, it can receive 
directly packeted setup commands or the ESA command.

Packeted setup commands can be sent to the product if you know the product’s 
current RS232 communication settings are known. Each setup command is 
acknowledged by a low-level ACK/NAK followed by a high-level acknowledge 
ACC/NAC following execution of the command if requested by the host 
(recommended). However, the results of successful barcode/RFID actions will be 
sent to the host in unpacketed format without acknowledgment from the host.

The ESA command is used to auto-connect to a product without knowing the 
current RS232 communication settings (autodetect loop) and switches temporarily 
to RC Protocol communication (until power off or reset command). In this mode, 
setup commands can be sent to the product or the product can be controlled by 
IMC commands (if IMC mode is then activated).

To put the product into RC Protocol mode (the communication is always in packet 
format), the product must be configured with the special “Remote Control 
Protocol - framed RC Protocol (19200, 8, N, 2)” command (read setup barcode 
obtained with EasySet software or send command through RS-232).