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User Manual – JetControl 365MC
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8.17 Modbus/TCP
Enabling the
Modbus/TCP
feature
On the JC-365MC controller, the Modbus/TCP feature is permanently enabled.
That is, bits 4 and 5 in Web Status register 202930 are always set.
R 202930
Web status
The register shows the available functions in bit-coded form.
Property
Description
Type of access
Read
Meaning of the individual bits
Bit 0
FTP server
1 =
available
Bit 1
HTTP server
1 =
available
Bit 2
E-mail
1 =
available
Bit 2 is set only if the configuration file
/EMAIL/email.ini
exists.
Bit 3
Data file function
1 =
available
Bit 4
Modbus/TCP
1 =
available
Bit 5
Modbus/TCP
1 =
available
Bit 7
FTP client
1 =
available
Tab. 52:
Web status
Modbus/TCP server
When the Modbus/TCP function is enabled and the Modbus/TCP server has
been started, registers, flags, inputs and outputs can be accessed by an external
client.
Modbus/TCP client
The Modbus/TCP client included in the device supports only Class 0 Confor-
mance. This class uses commands for reading and writing multiple registers. One
frame transmits up to 125 registers of 16 bits width.
As protocol ID "0" is used. Assignment of transmitted and received frames is car-
ried out using the transaction ID.