6 - 2 EA3600 Network Connect Product Reference Guide
Modbus Register Mapping
The Modbus TCP interface provides access to registers that hold parameters and data used in the transfer of
barcode data read by the EA3600 to the controller.
EA3600 Identity and Version Information Registers
Register Type: Input
Register Range: 1 - 42
Access Functions: (04) Read Input Registers
The Identity and Version registers hold information about the EA3600 device and its software. The registers are
mapped as shown in Table 6-2.
Status and Barcode Data Registers
Register Type: Input
Register Range: 200 - 2255
Access Functions: (04) Read Input Registers
The Status and Barcode Data registers holds the current status of the barcode transfer and the barcode data itself.
The format of the register data follows the description above. The register mapping of each Input Data field is
defined in Table 6-3.
Table 6-2 Identity and Version Registers
EA3600 Identity and Version Register Mapping
Register
Address
Register
Count
Parameter
Data
Type
Description
1 1 Firmware Revision UINT16 High byte is the Major revision. Low byte is the
Minor revision.
2 16 Serial Number String The serial number of the EA3600.
18 25 Product Name String The EA3600 product / model name.
NOTE Modbus TCP limits register transfers to up to 125 bytes long. To read all of the barcode data for larger
barcodes (up to 4096 bytes or 2048 words of data), it may be necessary to make multiple reads. For
example, read the 125 registers starting at address 200, read 125 registers starting at address 325, and
so on.
Table 6-3 Status and Barcode Data Registers
Status and Barcode Data Register Mapping
Register Address Register Count Field
200 1 Status Register
201 1 Update Counter
202 1 Barcode Type
203 4 Reserved
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