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DPM-100 Digital Panel Meter Modbus
®
Display
Instruction Manual
27
Snooper Mode (
Snoopr
)
The Snooper mode is used to listen to data being transmitted on the bus. Multiple Snoopers can be connected to the
RS-485 bus and display any process variable. The same process variable can be displayed in multiple locations. Use
the menu below to configure Snooper Mode parameters.
Notes:
1. To minimize the possibility of communication errors and communication break conditions, use a poll time of 5
seconds or more with slow baud rates (e.g. 4800 bps or less).
2. The response time for scanners set up for Snooper mode must be greater than the Master’s poll time. This
setting corresponds to the time window during which the Snooper listens to the bus for a reply by the slave
device being polled by the master device. As soon as the Snooper detects a new reply on the bus, the display is
updated. If there is no reply within the response time setting, the Snooper goes into communications break
condition.