Advantech WISE-4671 User Manual page 50

Low-to-High Delay: Low-to-high delay mode is similar to digital output mode;

the only difference is that there will be a time delay when the output value
changes from "logic low" to "logic high". The delay time can be defined by enter-
ing its value in the Delay Time box on the Configuration page. The digital out-
put value can be controlled by clicking DO tab and the current value can be
viewed from the digital out status LED display on the IO Status page.
High-to-Low Delay: High-to-low delay mode is similar to digital output mode.

The only difference is that there will be a certain time delay when the output
value changes from "logic high" to "logic low". The delay time can be set by
entering its value in the Delay Time box on the Configuration page. The digital
output value can be controlled by clicking the DO tab and its current value can
be viewed through the digital output status LED display in the IO Status page
(see below).
4.2.6.3 COM1 (RS-485 Port)
The WISE-S672/WISE-S617 has one RS-485 port for Modbus gateway functionality;
thus, you can use this port to poll data from RS-485 Modbus/RTU slave devices such
as the ADAM-4000 series or ADAM-5000/485 series.
Status
Go the COM1 tab to check the status or to configure the RS-485 Modbus master
function. A total of 64 addresses for all Modbus slaves can be mapped as the WISE
module I/O. These 64 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 64 bits can be shown here,

but you may map only fewer than 64 coils as bits, which makes the empty bits
invalid. The same applies to words, which may also have empty channels.
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