236
DATA 0
CRC CHK Low
CRC checksum:
16-bit, consists of 2 sets of 8-bit binary
CRC CHK High
END
Duration of input singal time is greater than equal 10ms
11.5.3 Slave Station Address
Use code between 0 and FF (hex) to set the slave station address. If a message with slave
station address 0 is sent (broadcast), the command from the master will be sent to all slaves.
The slave do not responds to a broadcast message.
00H: To all drive (broadcast)
01H: To drive address 01
0FH: To drive address 15
10H: To drive address 16, so on and so forth up to 31( 1FH).
11.5.4 Function Code
There are four types of function codes:
03H : Read Modbus registers
06H : Write a word to registers(Write to registers)
08H : Loopback test
10H : Write to multiple registers
11.5.5 Data
By combining the Modbus register address (test code in case of a loopback test) and the
register data, the drive configures consecutive data. The length of the data depends on the
command details.
The Modbus register always consists of a data length of two bytes. Data written into the
register must also consist of a length of two bytes. Register data read out from the drive will
always have two bytes.
11.5.6 Error Check
The drive check data validity using CRC scheme.
11.5.7 Command Data
When the drive receives data, it checks for errors. To do so, the drive calculates the CRC and
compares it to the CRC-16 value received in the message. The command will not be processed
if these two values do not match.
Use the default value of FFFFH (i.e., all 16 bits equal 1) to caculate CRC-16 in Modbus. Calculate
the CRC-16 checksum using the following steps:
Summary of Contents for EVO 6800 Series
Page 1: ...MANUAL Compact Vector Drive EVO 6800 Series...
Page 33: ...33 34 2 36 0 2 8 93 0...
Page 35: ...35 4 2 Main Circuit...
Page 41: ...41 4 3 Control Circuit...
