Honeywell HC900 - Manual (Page 47)

Modbus/TCP & Modbus RTU Function Codes
Function Code 17 (11h) - Report HC900 ID
Revision 10 HC900 Hybrid Controller Communications User Guide 39
12/07
Generic Class (00) Device Mapping - Describes the I/O and feature mapping.
Number of
Records
Record
#1
Record
#2
Record
...
Record
#n
Number of Records - 1 Byte unsigned value 00-FFh (byte 23)
Record Description:
Byte Description
00 Type of Data Element
(See Data Element Values Table Below)
01 Starting Address of Data Element Record (High)
02 Starting Address of Data Element Record (Low)
03 Number of Data Elements (High)
04 Number of Data Elements (Low)
Data Element Values Table:
Value Description
00 Analog Inputs
01 Not Applicable. Number of elements equals 0.
02 Discrete Inputs
03 Discrete Outputs
04 Control Loops
05 Set Point Programmers
06 Variables
07 Not applicable. Number of elements equals 0.
08 Not applicable. Number of elements equals 0.
09 Not applicable. Number of elements equals 0.
10 Schedulers
11 Signal tags
12 Signal tags List 2
13 Analog Inputs Accessed Using 3x Registers
14 Sequencers
15 Stage
16 Ramp
17 Hand Off Auto
18 Alternators
19 Device Controls
20 Control Loops Extended
21 Setpoint Programmers Extended
22 Schedulers Extended
23 Sequencers Extended