COMMUNICATIONS
Modbus Communication
117
Support Screen
Grants direct telephone or email support.
NOTE:
This screen can be viewed when disconnected from the drive.
About Screen
1.
Features Overview:
provides brief description of the app
2.
Terms of Use:
the legal compliance in using the apps
NOTE:
this screen can be viewed when disconnected from the drive.
Modbus Communication
The VFD can be controlled and monitored through the Modbus RTU protocol over an RS-485 connection.
Modbus follows a simple client-server model. Server devices perform data read/write requests which are
issued from a client device such as a Programmable Logic Controller (PLC) or Building Management System
(BMS). Assignable addresses for server devices range from an address of 1 to a theoretical maximum of 247.
As a server device, the VFD communicates all data using only 16-bit holding registers. Addressing for the
registers is partitioned into blocks that are multiples of 100 to group functionally similar data. If the drive is
configured to accept commands via remote communications, it can be commanded to start, stop, run at a
specified output frequency, target a setpoint in PID control, and reset faults.
For Modbus addresses, refer to
“ModBus Commands and Data Addresses” on page 119
X-Drive Configuration for Modbus
Use the X-Drive’s internal COM1 Port to connect to a Modbus net
-
work. COM1 can be accessed either through terminals SG+ and SG–
(1) or through one of the RJ45 connectors (2). RJ45 pins 4 and 5 are
connected in parallel with SG+ and SG– and pins 3 and 6 are paral
-
lel with SGND and Ground.
The X-Drive can also communicate with a Modbus network through
Ethernet if an accessory Ethernet Communication card is installed
in the VFD. Refer to
“Optional Extension Cards” on page 125
To enable Modbus communications, set the following parameters:
1
2
MI1
MI3
MI5
MI7
SGND
MI2
MI4
MI6
MI8
SG+
SG–
1
2
8 1
8 1
Summary of Contents for CERUS X-DRIVE CXD-003A-4V
Page 2: ......
Page 3: ...CERUS X DRIVE INSTALLATION AND OPERATION MANUAL Firmware Version 1 2 Franklin Electric Co Inc ...
Page 96: ...OPERATION Protection Features 96 ...
Page 112: ...ADVANCED APPLICATION OPTIONS Multi Drive Configurations 112 ...
Page 124: ...COMMUNICATIONS BACnet Communication 124 ...
Page 128: ...ACCESSORIES Optional Extension Cards 128 Frame D Frame E Frame F ...
Page 129: ...ACCESSORIES Optional Extension Cards 129 Frame G Frame H ...
Page 132: ...ACCESSORIES Optional Extension Cards 132 ...
Page 234: ...PARAMETER REFERENCE TABLES Parameter Descriptions Motor Menu 234 ...
Page 250: ...GLOSSARY 250 ...