WISE-4610(P) User Manual 44
Modbus Configuration - Rule Setting Tab
The items on this tab allow users to configure the Modbus address of end devices to
be polled.
Rule: Each COM port can support a maximum of 8 rules. Each rule can be for a
different slave device. This means a maximum 8 of devices can be connected to
the COM port. Alternatively, all the rules can be used for polling different
addresses on the same slave device.
Slave ID: Each slave device connected to the RS-485 port has a unique slave
ID. This item is the slave address of the Modbus devices connected to the WISE
module.
Type: This device supports Modbus data types: 01 Coil Status (0x), 02 Input
Status (1x), 03 Holding Registers (4x), and 04 Input Registers (3x). After one of
the types has been configured in the rule, the rule will be enabled and the COM
port will start polling after the configuration has been implemented.
Start Address: Enter the first address number to be polled. The address base
is 1. To poll the first address of a holding register (i.e., 40001), simply input the
number “1” (users do not need to input the entire address “40001”).
Length: Input the length of the address to be polled in this rule. For example, to
poll 40001 ~ 40008, set the length as “8”. Because each COM port can poll a
maximum of 32 addresses, the maximum length is 32, and the total number of
all rules should not exceed 32.
R/W: This item allows users to set whether the address in this rule is read or
written. For coil statuses and holding registers, users can configure these
addresses as read-only or write-only to reduce the polling effort.
Scan Interval (unit: s): This item allows users to set the scan interval for the
COM port to poll Modbus slave devices. The COM port optimizes the scan inter-
val according to the setting configuration. However, the read scan interval may
depend on factors such as the Baud rate, slave device response time, and delay
between polls. See the Diagnostician page to check the real response time as
a reference for the scan interval value.
Mapping Channel: When the Modbus address of slave devices is configured in
each rule, these addresses are also mapped to the WISE module. the coils and
registers of Modbus slave devices are mapped as bits for RESTful web service.
There are 32 continuous channels of bits and another 32 continuous channels
of words that can be mapped. Ensure that the channels for each rule do not
overlap.
Log: This item allows users to set whether the data polled from this rule is
logged in the data logger.
Deviation/Change of Status (COS): When this item is enabled, the difference
between the current poll and last poll values can trigger a deviation/COS
(change of state) for push data or log data.
Rule Status: The web configuration interface will check whether the rule set-
tings have any overlap or conflict. Rules can be enabled/disabled by setting the
Type value. Enabled rules will be denoted with a green icon. The system will
prompt users to confirm the submission of rules.
Note! After configuring the rules, click Submit to implement them.
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