Toledo Transducers MoniTTor N269, Installation And Operation Manual

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9
FIGURE 7 - N269 Process Control Zone Chart
This meter is designed to determine the peak load on each cycle of the press and respond to
the load by operating the appropriate relays. The 4 variable setpoints establish the 5 zones
shown on the sketch. For resolution and accuracy a 4 digit display shows the load.
DEcrease Zone Relay
Acts in response to loads
greater than setpoint #4
|//////|******| Relay has a timer and a
|//////|******| 1-9 preset counter
|/ RE /|******|
|//////|******|
HIGH SETPOINT #3-----------------|******|------|
|******|::::::|
|* DE *|::::::| GOod Part Zone Relay
|******|::::::| Relay operates each
HIGH SETPOINT #4------------------------|::::::| time the load is
|::::::| greater than set-
|: GO :| point #6 and less
|::::::| than setpoint #3
LOW SETPOINT #5------------------------|::::::| Relay has a timer
|++++++|::::::|
|+ IN +|::::::|
|++++++|::::::|
LOW SETPOINT #6-----------------|++++++|------|
|//////|++++++|
|/ RE /|++++++| INcrease Zone Relay
|//////|++++++| Acts in response to loads
|//////|++++++| less than setpoint #5
REject Zone Relay has a timer and a
Two relays - both act in 1-9 preset counter
response to loads greater
than setpoint #6 or less
than setpoint #3. REject Relay has a timer
SHUTdown Relay has a 1-9 preset counter
The meter has 5 relays - 2 for the REject zone and 1 for each of the DEcrease, INcrease, and
GOod part zones. One or two process control relays may operate at once depending on the
load and preset counter values.
Three of the relays have their own 1-9 preset counters. For one of these relays to operate, the
consecutive number of loads set on the preset counter must occur in its load zone. A number
less than this will cause the count to start over. Thus, if the DEcrease zone preset counter is set
to 3, the DEcrease relay would operate after 3 loads in a row above the #4 high setpoint.
Four of the relays have their own separate timers that control the length of time the relay remains
operated. Thus, if the INcrease zone relay timer is set for .8 seconds and the INcrease relay
operates it will remain operating for .8 seconds. These timers may be set to any time between 0
and 99.99 seconds.