SATEC SA300 ezPAC Operation Manual - Manual (Page 45)

Chapter 4 Using HyperTerminal HyperTerminal Commands
SA300 Substation Automation Unit 45
COM1:
Protocol [MODBUS_RTU/MODBUS_ASCII/DNP3]: MODBUS_RTU
New:
Interface [232/422/485]: 232
New:
Device Address [1-247]: 1
New:
Baud Rate [300-115200]: 19200
New:
Data/Parity [7E, 8N, 8E]: 8N
New:
CTS Protocol [y/n]: N
New:
RTS Protocol [y/n]: N
New:
Transmission Delay [0-1000 ms]: 5
New:
Inter-character Timeout [1-1000 ms]: 4
New:
If you want to change a protocol, device address or another port setting, type your
new setting after the “New:” prompt and press Enter. To leave the setting unchanged,
just press Enter.
The following table lists available communication options:
Name Description Options Default
Protocol Communications protocol MODBUS_RTU - Modbus RTU
MODBUS_ASCII - Modbus ASCII
DNP3 - DNP3.0 MODBUS_RTU
Interface COM1-COM3 interface option 232, 422, 485 232 (COM1)
485 (COM2/3)
Device Address Device address 1-247 (Modbus)
1-255 (DNP3.0) 1
Baud Rate Baud rate 300-115200 bps 19200 (COM1-
COM4)
57600 (COM5)
Data/Parity Data format 7E, 8N, 8E 8N
CTS Protocol When enabled, the port waits for
the CTS signal before sending data N - disabled
Y - enabled N
RTS Protocol When enabled, the RTS signal is
asserted 5 ms before sending data
and during the transmission N/Y N
Transmission
delay The minimum time that should
elapse after the last request
character is received to start the
transmission. Increase it if your RS-
485 port or converter fails to switch
the direction of the transmission
fast enough so your application
could lose characters. 0-1000 ms 5
Inter-character
Timeout
The maximum delay for which the
port should wait for a new character
to arrive while the receive line is
inactive. It is used with Modbus
RTU and DNP3.0 protocols to end a
reception of a message.
0-1000 ms 4
The Interface setting need not be changed. All serial ports currently work in half-
duplex mode regardless of the selected interface option.
The modem port (COM5) has a default baud rate of 57600 bps. It is recommended
not to decrease it in order not to affect the port performance.