4
Programming the Type 900
1.
Enter programme mode by pressing the
‘M’
key for approx 5 seconds. Each of the
6 menus can be accessed in the order above by pressing and releasing the
‘M’
key.
This is an example of setting Relay 1 ON point
Enter programme mode as in
(1)
above.
The LCD will display
‘r1on’
, press
‘E’
, the current value will be displayed, use the up and
down keys to enter the new value, press
’E’
when done to enter new value, the LCD will
briefly display
‘done’
then go back to the main menu and display
‘r1on’.
Press and release
‘M’
until the LCD reads
‘Fin’
, press
‘E’
this will exit programme mode and return to
‘run’
mode.
This can be repeated for each relay as necessary.
The LSD menu option (least significant digit)
The real time input signal display default is 4 digits and when the relay ON/OFF points are
programmed it is always 4 digits. This gives the best possible resolution and control of the
relays, i.e. their ON/OFF operation will be exactly as programmed to the least significant
digit (00.01mA). However sometimes due to application turbulence it may be less of a
distraction to display only 3 digits, this is achieved by turning the LSD OFF (UP key
toggles in the programme menu). Under these conditions it must be remembered that the
relays will operate at the programmed values and not the 3 digit value. This only effects
the display and not the relay set points.
Additional Notes on Programming
When adjusting the ON/OFF points the counter rolls from min to max and vice verse this
saves time.
The counter use’s a speed key function that increases the speed it is counting at if the UP or
DOWN button is continually pressed for a few seconds or more. When the counter is
getting close to the desired value release the key and then use individual presses and
releases for precision adjustment.
User parameters are stored in non volatile memory so will be retained if the Type 900 loses
power.
If power is lost during a cycle reapplying power will be treated as an initial power up i.e.
the input will be compared with the relay set points and the cycle restarted.
The fail safe of the Type 900 is automatically determined by the relay set points. If the ON
point is greater then the OFF point it is failsafe LOW, if the OFF point it is greater than the
ON point it is fail safe HIGH.
