Emerson Rosemount 3490 Series, Reference Manual

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4.4.18 Serial communications
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SETUP
→
[CONTROLLER]
→
SYSTEM
→
COMMUNICATIONS
This section is applicable if the RS232 serial port of a communication device (e.g. a PC) is
connected:
• Directly to the RS232 terminals of the Rosemount 3491 or 3492 Control Unit, or
• Indirectly via factory-fitted data download socket of the Rosemount 3493 control unit.
Table 4-39: Serial Communications Parameters
Parameter Description Factory default
P710 Address Keep the factory default setting. 0
P711 Interface Select between Log download (Rosemount 3493),
RS232 HART
, or
None
.
P712 Baud Rate This must be the same as set for the RS232 serial
port of the communication device. Range is 1200 to
115200. 1200 or 9600
P713 Start Bits This must be the same as set for the RS232 serial
port of the communication device. Range is 0 to 9. 1
P714 Data Bits This must be the same as set for the RS232 serial
port of the communication device. Range is 0 to 9. 8
P715 Parity This must be the same as set for the RS232 serial
port of the communication device. Options are
Even
,
Odd or None .
Even
P716 Stop Bits This must be the same as set for the RS232 serial
port of the communication device. Range is 0 to 9. 1
Related information
RS232 connections
4.4.19 Set-up the PIN security
Personal Identification Number (PIN) security prevents unauthorized people from
configuring the control unit. Typically, this is set-up when all the other programming has
been completed. As with bankcards, there is one PIN number. The factory default is for PIN
security to be inactive.
After PIN security is activated, a prompt for the PIN appears when needed for
authorization. If correctly entered, no further PIN requests are made unless there is a
period of keypad inactivity, or the
Cancel Password option is selected from the MAIN
MENU screen.
Getting started Reference Manual
January 2021 00809-0100-4841
132 Emerson.com/Rosemount