Rockwell Automation 2707-NP DTAM Programming Software - Manual (Page 110)

Chapter 14
Entering DTAM Configuration Data
14–4
The Advisor function allows screen changes to be made by the logic
controller. Alarm screens can also be triggered by the Advisor function. The
advisor consists of a controller address monitored by the DTAM. When the
advisor address contains a screen number, the corresponding screen is
displayed.
When you select DTAM Advisor from the DPS Configuration - Option
Selection menu, the following is displayed:
The DTAM Plus Advisor consists of four items:
Item Purpose
Read Register Number The controller address (16 bit) that the DTAM reads for the current
screen number. This register contains the screen number to be
displayed. This register only responds to a change. If a screen is to
be updated, a zero must be loaded into the register, followed by the
desired screen number.
Write Register Number The controller address (16 bit or bit type) that contains the ACK
and NAK bits which are written to and monitored by the DTAM
and controller. The write register is updated at the Update Interval
not the Advisor update rate. These bits must be reset by ladder
logic.
ACK Bit* The bit number within the write register that will be used as an ac-
knowledgement bit. If a bit type address was assigned for the write
register, this field will be filled in using the bit address specified.
ACK/NAK bits are used only to indicate that the DTAM has received
a message.
ACK Bit Polarity Defines the polarity (0 or 1) ACK/NAK bits:
When set to 1, a value of 1 for the ACK bit indicates a valid screen
and a value of 1 for the NAK bit indicates an invalid number.
When set to 0, a value of 0 for the ACK bit indicates a valid screen
and a value of 0 for the NAK bit indicates an invalid number.
Screen Write Enable When enabled, the DTAM Plus writes the current screen number to
the controller.
Screen Write
Register Number
The controller address that is written by the DTAM Plus when screen
write is enabled. This register contains the current screen that is
being displayed by the DTAM.
* NAK bit is always the next sequential bit after the ACK bit.
DTAM Advisor