Sensaphone SCADA 3000 Users manual - Manual (Page 294)

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SCADA 3000 User’s Manual
• Check that the SCADA 3000 software has configured the COM port to connect to a Phone
Modem. Click Comm>Setup from the Sensaphone Control Center Main Menu. Click the
appropriate Comm port tab and check that the port is Enabled and the Type is set to Phone
Modem.
• Make sure that your modem is turned on and plugged into a working telephone line.
If your modem dials the SCADA 3000, but won’t connect:
•Rings Until Answer may be too high. If Rings Until Answer is set too high, the SCADA 3000
software will time out before the 3000 can answer the call. Increase Dial Time Out or reduce
the number of Rings Until Answer.
• Carrier Wait Time may be too short.
• Dial Time Out may be too short.
• COM port Baud Rate setting may be too fast. This is frequently the case when using a cel-
lular telephone to make a modem connection to a SCADA 3000. Wireless phones are more
subject to noise and interference than land lines so you may need to slow down the baud rate to
establish and maintain a reliable connection.
1) Click Comm>Setup from the Sensaphone Control Center Main Menu.
2) Click the appropriate Comm port tab and select a slower Port Baud Rate until a
reliable connection is established.
• Check your Modem Setup String. SCADA 3000 software allows you to enter a setup string
of modem AT commands. These are usually only needed if you are having trouble getting your
modem to connect to a SCADA 3000 unit. See your modem Operators Manual for a list of AT
commands supported by your modem.
If your modem connects with a SCADA 3000, but the connection sometimes drops out:
1) Click Comm>Setup from the Sensaphone Control Center Main Menu.
2) Click the appropriate Comm port tab and try increasing the values of the follow-
ing:
• Check/Change Packet Retries. Information flows back and forth between SCADA 3000 and
your PC in data ‘packets’. Both units automatically check for packet transmission errors. When
a bad packet is detected, it gets re-sent. Packet Retries determines how many times a packet is
re-sent before a communication error is logged.
• Check/Change Retry Delay. Once a packet is sent, this is how long SCADA 3000 software will
wait for a response from the 3000 unit before re-sending it.
• Check/Change Packet Time Out. This is the amount of time between the bytes of data that a
make up a packet (also known as Inter-character Delay Time).
Will SCADA 3000 retain its programming if there’s been a long power failure and
the backup battery dies?
When all power is removed from the SCADA 3000, voice messages and unit programming
are retained in nonvolatile memory by an internal 3V lithium coin-cell battery. This battery
should provide at least 2 years of data storage without power and up to 10 years of intermittent
use.