4.1.8 Setting Pump Switching Delay
This feature enables the installer to set a length of time between recognising a water level above the
start probe and reacting by enabling the pump. This time is set in a range of 3 to 30 seconds.
Enabling this delay can lower the number of pumping cycles the pump and drive circuitry must endure.
Decreasing failure rate of pump and switching relay.
4.1.9 MODBUS
A MODBUS connection is available on BundGuard models.
MODBUS is available via RS232 or RS485.
The connectivity options available are:
-MODBUS enable (default: OFF)
-Serial protocol (default: RS485)
-MODBUS ID (default: 1)
-Listen mode (default: OFF)
-Baud rate (default: 19200)
The MODBUS ID is also configurable to a value within the range allowable in the MODBUS specification.
When addressing devices on the MODBUS bus, a unique device identifier number is required for each
device. This can only be set via the control panel menu system.
Listen mode is a non-responsive state that the MODBUS module can be placed in to. It permits the
device to only acknowledge and action any requests to write data. In listen mode, the MODBUS device
will not respond to successful or erroneous requests. It will however maintain the communication logs
for all requests received (Packets received, CRC errors etc). Listen only can be toggled ON or OFF in the
control panel menu.
Baud rate also must be set in the control panel menu. All values specified in the MODBUS serial
specification are available. These values are:
-300 baud
-600 baud
-1200 baud
-2400 baud
-4800 baud
-9600 baud
-14400 baud
-19200 baud
-28800 baud
-38400 baud
-56000 baud
-57600 baud
4.1.10 Floating Paint Values
The BundGuard issue 5 stores some register values in a floating point format. This is to allow for wide
ranges of decimal values to be stored. Floating point values are stored in a little-endian format across
two 16-bit MODBUS register locations. The data structure for how floating-point values are formatted
within these two register values is shown below.
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