TP Software User Manual
www.ismacontrolli.com
DMP253en | 1st Issue rev. 0 | 04/2022
page 6 of 49
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3 Communication Parameters
The TP panel is capable of simultaneously exchanging data on two buses, RS485 and USB.
3.1 RS485
The RS485 bus is accessible with RJ45 or 4-pin green screw
connector.
There are 3 communication protocols that can be selected using the DIP switch 2 and
PROTOCOL field:
DIP Switch 2
PROTOCOL (23)
Modbus RTU
Off
0
Modbus ASCII
Off
1
BACnet MS/TP
On
N/A
Table 2. Setting communication protocol
The Modbus register reading the protocol set on the DIP switch is the following:
PROTOCOL_DIPSWITCH
: reads the communication protocol set on the DIP switch;
Modbus register: 30003;
BACnet object: N/A.
3.1.1 Setting MAC Address
The device's MAC address can be set using one of the following methods:
rotary switch: sets addresses from 1-9; if 0:
ADDRESS (decimal address: 22).
The Modbus register reading the address set on the rotary switch is the following:
ADDRESS_ROTARY_SWITCH:
reads the Modbus address set on the rotary switch (0
means the address is read from the ADDRESS register/object);
Modbus register: 30002;
BACnet object: N/A.
3.1.2 Setting Communication Parameters
BACNET_DEVICE_ID:
sets the device's BACnet ID;
Modbus register: 40015;
BACnet object: DEVICE, property: Object Identifier;
BAUD_RATE:
sets
a baud rate of the panel. The baud rate is calculated according to the
formula: baud rate = (register's value)
⋅
10. The default value is 11520 (115200 bps);
Modbus register 40017;
BACnet object: DEVICE, property: 3084.
