D.12
SEL-751A Relay Instruction Manual Date Code 20100129
DNP3 Communications
DNP3 in the SEL-751A
The modem settings in Table D.8 are only available for DNP3 serial port
sessions.
Session 2 Settings
DNPIP2
a
IP address (zzz.yyy.xxx.www) 15 characters “”
DNPTR2
a
Transport protocol UDP, TCP TCP
·
·
·
URETRY2
a,c
Unsolicited messages maximum retry attempts 2–10 3
UTIMEO2
a,c
Unsolicited messages offline timeout, seconds 1–5000 60
Session 3 Settings
DNPIP3
a
IP address (zzz.yyy.xxx.www) 15 characters “”
DNPTR3
a
Transport protocol UDP, TCP TCP
·
·
·
URETRY3
a,c
Unsolicited messages maximum retry attempts 2–10 3
UTIMEO3
a,c
Unsolicited messages offline timeout, seconds 1–5000 60
Serial Port Settings
MINDLY
b
Minimum delay from DCD to TX, seconds 0.00–1.00 0.05
MAXDLY
b
Maximum delay from DCD to TX, seconds 0.00–1.00 0.10
PREDLY
b
Settle time from RTS on to TX; Off disables PSTDLY OFF, 0.00–30.00 0.00
PSTDLY
b
Settle time from TX to RTS off; hidden if PREDLY set to Off 0.00–30.00 0.00
a
Available only on Ethernet ports.
b
Available only on serial ports.
c
Hidden if UNSOLn set to N.
Table D.7 Port DNP3 Protocol Settings (Sheet 2 of 2)
Name Description Range Default
Table D.8 Serial Port DNP3 Modem Settings
Name Description Range Default
MODEM Modem connected to port; all following
settings are hidden if MODEM set to N
Y, N N
MSTR Modem startup string Up to 30
characters
"E0X0&
D0S0=4"
PH_NUM1 Primary phone number for dial-out Up to 30
characters
“”
PH_NUM2 Secondary phone number for dial-out Up to 30
characters
“”
RETRY1 Retry attempts for primary dial-out; hidden
and unused if PH_NUM2 set to “”
1–20 5
RETRY2 Retry attempts for secondary dial-out; hidden
and unused if PH_NUM2 set to “”
1–20 5
MDTIME Time from initiating call to failure due to no
connection, seconds
5–300 60
MDRET Time between dial-out attempts 5–3600 120