SMAR MB-700, User Manual

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MB-700 – User’s Manual
4.2
Ethernet
PC without
Ethernet Adapter
LC700
RS-232
MB-700
Data flow direction:
Serial to TCP
MB-700
Data flow direction:
TCP to Serial
RS-485
DFI302
MB-700
MB-700
Figure 4.2 – MB-700 Configuration Example as Serial Slave (MB-700 Communication with
Work Station) and Serial Master (MB-700 Communication with LC700)
NOTE
For this scenario, MB-700 does not support CCSM and CCCM Blocks.
MODBUS Addresses
User must attribute a Modbus address to the MB-700. However this address must be unique in the
Modbus networks where the MB-700 is connected through Ethernet or serial ports. In this case, user
must set the DEVICE_ADDRESS parameter. The default value for this parameter is 247.
Configuring the Serial Media
In applications where the serial port of MB-700 is used, user must set the following parameters:
1 - Rate of transference of the serial ports
It is possible to select the baud rate of data in the serial ports. They may be set through the
parameter BAUD_RATE. It allows the selection among the following baud rates:
9
0: 100 bps
9
1: 300 bps
9
2: 600 bps
9
3: 1200 bps
9
4: 2400 bps
9
5: 4800 bps
9
6: 9600 bps(default)
9
7: 19200 bps
9
8: 38400 bps
9
9: 57600 bps
9
10: 115200 bps
2 - Parity
Parameter PARITY defines the type of parity to the serial ports.
9
0: No parity
9
1: Even Parity (default)
9
2: Odd parity
3 – Timeout and Number of retransmissions
Timeout : time waited for an answer from a slave, after a message has been sent through one of the
serial (P1 or P2) or Ethernet ports. The TIME_OUT parameter can change between 0 and 65535
milliseconds, and its default value is 1000. This parameter is directly connected to the
NUMBER_RETRANSMISSIONS parameter.
Number of retransmissions : number of times the MB-700 will retry to communicate with the slave
device after not getting a reply. The time waited for this answer is set in the TIME_OUT parameter.
The number of retransmissions is chosen through the NUMBER_RETRANSMISSIONS parameter.
User may select a value in the range 0 to 255 to this parameter, and its default value is 1.