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protocol to “ScaleNet”. For more information on the WinMerik application,
contact the Merrick Customer Support department.
DF1
DF1 is an Allen-Bradley protocol primarily used to communicate with Allen
Bradley devices such as PLC’s and DeviceNet interfaces (DNI’s).
Modbus RTU
Genetix controllers support the Modbus RTU communications protocols. They
will act as slaves, supporting the Modbus functions 3 (Read Holding Registers)
and 16 (Preset Multiple Registers). Function 8, sub function 0 (Return Query
Data) is also supported. The master is assumed to maintain a cyclic
conversation with the controller, which exposes the Merrick Common Interface
Table (CIT), making it possible monitor and supervise the Genetixcontroller
completely.
This protocol is commonly used to interface Genetix controllers with a variety of
industrial networks, often with the use of protocol converters. Modbus RTU is a
binary protocol.
Modbus ASCII
Genetix controllers also support the Modbus protocols as above, in its ASCII
form.
Modbus TCP
This protocol is again the Modbus protocol, supported in the Genetix as above,
encapsulated in TCP/IP format and transported over Ethernet networks. Use of
this protocol requires an optional Ethernet converter.
Monitor
Monitor is a special protocol developed by Merrick primarily for test and
diagnostic purposes. With it, any PC equipped with terminal emulation software
can connect to a Genetix controller and receive a tremendous amount of data
for diagnostic purposes.
None
Selecting “None” for a communications protocol effectively shuts off that port,
disabling all communications functions.
Baudrate
This is the communications data rate in bits per second. Master and slave devices
must have the same setting for communications to take place. Baudrate must be
selected from one of the following settings: 2400, 4800, 9600, 19200, 38400,
57600, 115200, and 230400.
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