Operator Console Functions - nvent 910 Series Installation, Operating And Maintenance Instructions

5.7 OPERATOR CONSOLE FUNCTIONS

46 | nVent.com
AUTO. The controller will automatically select a profile based on the type of communications
interface installed in the 910.
IMPORTANT:
• AUTO: Selects a communications profile based on the data rate and the type of communi-
cations interface installed in the 910.
• 3-WIRE RS-232: Continuously asserts the internal RTS signal. Internal CTS and DCD signals
are ignored. The Tx Delay timer is active. This is the profile used when PROFILE = AUTO and
an RS-232 communication interface is used with the 910.
• RS-485: Uses the internal RTS signal and the Tx Delay timer. Internal CTS and DCD signals
are ignored. This is the profile used when PROFILE = AUTO and an RS-485 communication
interface is used.
• 1200 BAUD MODEM: Uses the internal RTS signal with a fixed 10 msec Tx Delay time,
ignores the internal CTS signal. Uses the internal DCD signal to qualify each receive data
character. This is the profile used when PROFILE = AUTO, BAUD RATE = 1200 and a MODEM
communication interface is used.
• 300 BAUD MODEM: Uses the internal RTS signal with a fixed 30 msec Tx Delay time, ignores
the internal CTS signal, uses the internal DCD signal to qualify each receive data character.
This is the profile used when PROFILE = AUTO, BAUD RATE is not 1200 and a MODEM
communication interface is used.
5.6.10 TX DELAY
Purpose: Allows a programmable delay between the receipt of a communications message
and the controller's reply. In some applications, it may be necessary to delay the controller's
response to an inquiry for a short period of time to allow external devices to start up, stabilize
and/or synchronize.
Range: 0.00 to 2.50 seconds
Procedure: Set the amount of delay between the receipt of a message and the controller's
response as required.
IMPORTANT: This selectable TX DELAY is only used if the PROFILE is set to either RS-485 or
AUTO and an RS-485 interface is installed.
The following features are part of the controller's programming, but are only used in
conjunction with the Operator Console.
5.7.1 PASSCODE
Purpose: The four digit, numeric PASSCODE feature stops unauthorized users from modifying
the controller's configuration parameters using the Operator Console.
Range: 0000 to 9999
Procedure: Enter the desired PASSCODE (in the "Miscellaneous Common Setup" submenu)
using the Operator Console keypad. A PASSCODE of 0000 disables the lockout feature and
allows all configuration parameters to be modified using the Operator Console without
requiring a PASSCODE. Setting the PASSCODE to any other value will require the database
to be unlocked by entering the correct PASSCODE prior to modifying any of the controller's
configuration parameters using the Operator Console.
IMPORTANT: The PASSCODE can be edited only if it is set to 0 or the database has been
unlocked by entering the proper PASSCODE.
5.7.2 LOCK DATABASE
Purpose: If the PASSCODE has been enabled (PASSCODE is not set to 0) and the user has unlocked
console modification access to the controller's configuration parameters, the LOCK DATABASE
feature allows the user to re-lock this modification access once programming has been completed.
Procedure: Select the LOCK DATABASE function (at the end of the "Configuration Mode