Emerson Electric KJ1710X1-BA1 Factory Automation System

Description

Each device on the SLIM serial bus KJ1710X1-BA1 has an address. This provides a method for the

SLIM to talk individually to each card.

The SLIM serial port is used for redundancy serial communications. Setting the

address to zero (0) disables SLIM transmit/receive code.

calhndrd =

31200

This value is displayed in decimal. It is the KJ1710X1-BA1 converted hexadecimal A/D converter

reading for the 100% position. It can be entered by the customer; however, it is

normally determined automatically by the calibration sequence.

calzero = –

31200

This value is displayed in decimal. It is the converted hexadecimal A/D converter

reading for the 0% position. It can be entered by the customer; however, it is normally

determined automatically by the calibration sequence.

This value is given in percent per minute and is the movement rate used when

calibrating from the Laptop computer via the KJ1710X1-BA1 serial port. It is typically the Faster rate.

calrateS = 1664 This value is given in percent per minute and is the movement rate used when

calibrating via a command from the Ovation I/O interface. It is typically the Slower

rate.

Note

When the raise/lower button is pressed, the Valve Positioner will respond to the

keystroke if the address is 1 through 8 inclusive. This means that all valves will move

together.

posErrDelta =

5.0

A tunable parameter which sets a limit for the difference between target and actual

position. When the difference is KJ1710X1-BA1 greater than this limit, POSITION ERROR FLAG is

set TRUE, otherwise it is FALSE. This variable is similar to contingency except that it

is devoted to the redundant calculations.

maxdelta = 5.0 A tunable parameter which sets a limit for the difference between position feedback

and previous position feedback. The default value is 5%. Expressing the value as a

derivative would yield 5% per 10 msec (= looptime) or 500% per second. This value is

intended to represent the maximum rate of movement of the valve. This value has a

function similar to MIN2NDRY. It is assumed that MAXDELTA will always be the

smaller of the two.

min2ndry = 5.0 The minimum secondary value is similar to MAXDELTA because it represents a

position feedback derivative. However, MIN2NDRY describes the minimum value in

percent of a contribution of either secondary KJ1710X1-BA1 signal. If the secondary wire were to

break, position feedback would suddenly change by at lease this amount. The default

value is 10%. If the difference between position feedback and previous position

feedback were to change by this value, or greater, it suggests a broken secondary wire.

It is assumed that MIN2NDRY is larger than MAXDELTA.

lvdtTrack = 1.5 The maximum difference between LVDT readings in a redundant confifiguration

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