Adding A Wireless Device To The Gateway - Monnit Serial MODBUS Quick Start Manual

To perform a reset, write the "RST_DEVICE" Gateway Coil @
address 3 to TRUE. The device will reset one second after receiving
this command. Your new communication settings will be in effect.
You can also power cycle the gateway and get the same result.
To verify them, attempt to read the Gateway ID from registers
40002 - 40003.

5. Adding a Wireless Device to the Gateway

DO NOT INSERT BATTERIES UNTIL SENSOR HAS BEEN
REGISTERED.
In order for the Serial MODBUS Gateway to activate the wireless
network, you will need to register at least one wireless device.
Each Monnit device has a 32-bit serial identifier
(SID). To add a wireless device, this SID is
written to the intended SLOT (two registers at a
time) in WDL registers. You must use FC = 16
(Write to Multiple Registers) otherwise an error
will be generated. SLOT IDs can only be added
one at a time.
A sensor is added by writing this identifier into
one of the 50 available slots in the Wireless
Device List (WDL). The WDL registers can be read to discover the
identifiers loaded into gateway and to what SLOT they are
registered. If the proper two registers constituting a SLOT are
written to, the wireless device will be registered at that SLOT in the
gateway.
RAW FORMULA = 100 + (2 * SLOT)
FC FORMULA = 40101 + (2 * SLOT)
SLOT = {0 - 49}
List entries can be as follows:
• 0xFFFFFFFF: EMPTY
• Otherwise, a real device is registered
Example:
Register Name
WDC [0]
Address
FC 2001 / 2000
- 7 -
Register Name
WDC [49]
Address
FC 2197 / 2196