TSI Instruments PRESSURA RPC30

Modbus Communications (continued)
Network/Modbus
®
Communications 91
XRAM Variables
These variables can be read using Modbus
®
command 03 Read Holding Registers. They can
be written to using Modbus
®
command 06 Write Single Register. Many of these variables are
the same “menu items” that are configured from the controller keypad. The calibration and control
items are not accessible from the DDC system. This is for safety reasons since each room is
individually setup for maximum performance.
RPC30 Variable List
Variable Name
Variable
Address
Read/Write
Integer DDC system receives
Number of Rooms
0
Read
1
2
1 Room
1 Room with Anteroom
Devices Controlled
1
Read
1
2
3
None
Exhaust
Exhaust / Supply / Temp
Measurements
Displayed
2
Read/Write
1
2
3
Room Status
Room Status and Pressure
All Measurements
Display Average
3
Read
1
2
3
4
5
6
7
1 second
2 seconds
3 seconds
5 seconds
10 seconds
20 seconds
40 seconds
Units
4
Read/Write
1
2
3
in. W.C., cfm, F
Pa, lps, C
Pa, m
3
/hr., C
Access Codes
5
Read/Write
1
2
3
4
Off
Room Mode
Menus
Room Mode and Menus
Relay 2
Configuration
6
Read
1
2
3
High Alarm
Negative Room Mode
Positive Room Mode
Input 1
Configuration
7
Read
1
2
TSI Sensor
Pressure Transducer
Input 2
Configuration
8
Read
1
2
3
4
TSI Sensor
Pressure Transducer
Temperature Setpoint
None
Input 3
Configuration
9
Read
1
2
3
4
7
Supply Pressure Flow
Supply Linear Flow
Supply Venturi
Supply Switch
None
Input 4
Configuration
10
Read
1
2
3
Room 1 Door Switch
Room 1 Occupancy Sensor
None
Input 5
Configuration
11
Read
1
2
3
Room 1 Key Switch
Relative Humidity
None