Sensaphone SCADA 3000 Users manual - Manual (Page 62)

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SCADA 3000 User’s Manual
Figure 3: Modem Setup form
On this form, select the modem type and the necessary setup string for that modem. Change
Dial Time-Out, the Inter-Call Delay, and Dial Retries if you want settings different from the
defaults.
Baud Rate: Set the baud rate for the selected port. If your communication type is
modem, set the baud rate to the fastest rate your modem will support. If you will
be connecting your serial port directly to the SCADA 3000, set the baud rate to
38400.
Answer Incoming Calls: Check this box if you want the modem to receive alarm
calls or e-mail calls from the SCADA 3000.
Full Duplex Buffering: Allows communications to run faster during Register
Verification by buffering multiple bytes during transmission. Highly recommended
for modem communications.
The Modbus Protocol Settings are explained below.
Packet Retries: Information flows back and forth between SCADA 3000 and your
PC in data “packets.” Both automatically check for packet transmission errors.
When a bad packet is detected, it gets sent again. Packet Retries determines how
many times a packet is sent before a communication error is logged. Default
retries is 5.
Packet Timeout: The amount of time before the PC gives up and determines that
an individual modbus request has timed out. Decreasing this parameter will not
increase performance, but increasing the parameter may remove occasional errors.
Default: 500 milliseconds.
Retry Delay: This is the amount of time the SCADA 3000 software will wait for a
response from a unit before it decides to make another communication request.
Default is 500 milliseconds.
Buffer Size: Determines the number of bytes to be buffered during communications.
(typical=256)
When you finish configuring the ports manually, click OK to close this form.