ABB LevelMaster 7100, User Manual, Page: 71 / 100

LevelMaster 7100 User manual 2105835 Rev AA | 61
Figure 54: Host hardware digital outputs
Push-to-Read (optional)
The Push-to-Read function is applicable when the LevelMaster is powered from the Totalflow host controller (power provided by
the serial RS-485 port on the controller). Normal function of these control units consists of a scrolling display of information.
Because these units normally control and collect data from multiple devices, the Push-to-Read function is particularly useful to
force communication with the LevelMaster and then display only those items programmed to display during the Push-to-Read
operation. This is actually combining two separate but useful functions:
Force poll of one or more LevelMasters: function before and after a sale
Switch display to LevelMaster readings: goes directly to the information requested
Wiring the Push-to-Read input button
To wire the push-to-read input button:
1. Locate the pulse or digital input + and – on the main electronics board as shown in Figure 55.
2. Install the switch in the enclosure per the manufacturer’s instructions, leaving enough wire to reach the location of the DI or
PI.
3. Remove power from the main electronics board, and wire the switch into the connector. The connector is removable from
the board to aid in field wiring.
Figure 55: Host hardware digital inputs
IMPORTANT NOTE: See the Contact us information on the back of this manual for support with this procedure.