Advantech WISE-4671 User Manual page 80

COM1 (RS-485 Port)
WISE-4671 features one RS-485 port for Modbus gateway functionality. This port
can be used to poll data from RS-485 Modbus/RTU slave devices, such as Advant-
ech's ADAM-4000 or ADAM-5000/485 series devices.
Status
Navigate to the COM1 tab to check the status or configure the RS-485 Modbus mas-
ter function. A total of 32 Modbus slave addresses can be mapped as the WISE mod-
ule I/O. These 32 addresses can be coils or registers; coils will be mapped as
extension bits of the WISE module, and registers will be mapped as extension words
of the WISE module. In the COM1 status tab, the bits and words are shown on indi-
vidual pages.
Channel: Indicates the number of bits. A maximum of 32 bits can be displayed,
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but less than 32 coils can be mapped as bits. The empty bits are invalid. The
same applies to words, which may also have empty channels.
Value: This shows the value polled from mapped addresses.
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Status: This shows the status of each bit or word. If a channel is empty or has
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not been mapped to a Modbus slave address, the status will be "Unavailable".
Slave ID: This is the Modbus slave ID of RS-485 Modbus slave devices.
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Slave Address: This is the address of a bit or word from an RS-485 Modbus
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slave device.
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