Rpm20 Variable List - Pressura RPM10 Operation And Service Manual

Modbus Communications (continued)

RPM20 Variable List

Variable Name
Status Index 79
Room 1 Label 80 to 86
Room 2 Label 87 to 93
Anteroom Label 94 to 100
EXAMPLE of 06 Write Single Register function format:
This example changes the normal low face velocity alarm set point to 60 ft/min.
QUERY
Field Name
Slave Address
Function
Starting Address Hi
Starting Address Lo
Data Value (High)
Data Value (Low)
Error Check (CRC)
EXAMPLE of 03 Read Holding Registers function format:
This example reads the face velocity and current face velocity set point.
QUERY
Field Name (Hex)
Slave Address 01
Function 03
Starting Address Hi 00
Starting Address Lo 00
No. Of Registers Hi 00
No. Of Registers Lo 02
Error Check (CRC) --
®
Network/Modbus Communications
Variable
Address Read/Write
Read
Read
Read
Read
RESPONSE
(Hex) Field Name
01 Slave Address
06 Function
00 Starting Address Hi
16 Starting Address Lo
00 Error Check (CRC)
3C
--
RESPONSE
Field Name
Slave Address
Function
Byte Count
Data Hi
Data Lo
Data Hi
Data Lo
Error Check (CRC)
Integer DDC system receives
1 Normal
2 Room 1 Negative Low Alarm
3 Room 1 Negative High Alarm
4 Room 1 Positive Low Alarm
5 Room 1 Positive High Alarm
6 Low Exhaust Alarm
7 Low Supply Alarm
8 Low Temperature Alarm
9 High Temperature Alarm
10 Low RH Alarm
11 High RH Alarm
12 Anteroom Negative Low Alarm
13 Anteroom Negative High Alarm
14 Anteroom Positive Low Alarm
15 Anteroom Positive High Alarm
16 Room 2 Negative Low Alarm
17 Room 2 Negative High Alarm
18 Room 2 Positive Low Alarm
19 Room 2 Positive High Alarm
20 Data Error
(Hex)
01
06
00
16
--
(Hex)
01
03
04
00
64 (100 ft/min)
00
64 (100 ft/min)
81