User`s manual
Configuration
GFK-1742A Chapter 4 Configuration 4-7
4
Table 4-4. SNP Port Tab
Configuration
Parameter
Description Values Defaults Units Ref.
Baud Rate Baud rate of SNP
Port
300, 600, 1200, 2400, 4800, 9600,
19200
19200 N/A 2.01
Stop Bits Number of stop bits 1 or 2 1 N/A 2.02
Parity Parity ODD, EVEN, NONE ODD N/A 2.03
Idle Time Maximum link idle
time
1...255 10 sec 2.04
Modem
Turnaround Time
Modem turnaround
time
0…255 0 .01
sec/count
2.05
SNP ID SNP ID 7 characters consisting of A-F and 0-
9. First character must be A-F
A000001 N/A 2.06
2.01
Baud Rate
. The baud rate parameter specifies the transmission rate, in bits per second, of data
through the serial port.
2.02
Stop Bits
. All serial communications devices use at least one (
1
) stop bit. For slower devices,
set this parameter to two (
2
) stop bits.
2.03
Parity
. Specifies whether or not a parity bit is to be used (
NONE
if not), and if so, whether it
should be
ODD
or
EVEN
.
2.04
Idle Time
. Specifies the time, in seconds, that the DSM314 will wait for a new message to be
received from the master device before assuming that communications have been lost or
terminated. In such a case, the DSM314 will reinitialize to wait for the start of a new SNP
connection sequence.
2.05
Modem Turnaround Time
. When utilizing a modem, a Modem Turnaround Time must be
specified. This is the time required for the modem to start data transmission after receiving the
transmit request. If no modem is used, 0 should be specified. If a modem is used, a value greater
than 0 must be specified.
2.06
SNP ID
. An identifier consisting of from 0 to 7 characters consisting of A-F and 0-9. The first
character specified must be in the set A-F. The identifier must be utilized for a multi-drop network.
The DSM314 will support multi-drop connections only if the RS232 connection is converted to
RS422/485.
Note
Since this Serial Communications Port is used only for upgrading the DSM314’s
firmware, it is recommended you leave this port’s communications settings at
their default values. Use cable IC693CBL316 to connect this port to the serial
port of a personal computer running the firmware upgrade software.