ADTEK CPM-80 Series Operation Manual page 50

In the functions, the DO of the expansion module is the same as the RO function of the
meter, but the action mode is different. The DO action mode of the expansion module is
the level or pulse output mode. When set to pulse mode, you can set the output pulse
width time. In addition, DO output trigger can also set the trigger conditions, such as
more than(>), equal to(=), less than(<) the set point. The setting address of the expansion
module DO is shown in Table 4-20.
▼ Table 4-20
Note: The communication protocol of DIO expansion module is Modbus RTU. Therefore,
the command for reading DI or controlling DO is the standard command code such as
01/02/05, so the expansion module used should support the same communication protocol
and above command code can be used normally.
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