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Modbus/TCP & Modbus RTU Function Codes
Definition
18 HC900 Hybrid Controller Communications User Guide Revision 4
9/03
Table 4-2 Maximum Number of Object Addresses
Max. No. of Addresses
Object Name
HC930 HC950
Function Code
Analog Inputs 128 640 3: can only access
first 8 slots of rack 1
4: can access all
slots and racks
Discrete Input 256 1280 2
Discrete Output/Coil 256 1280 1: read
5: force
Loop 8 32 3
Variable Value 600 600 3
Set Point Programmer Value 8 8 3
Segments per Set Point Programmer 50 50 3
Tagged Signals 2000 2000 3
Scheduler Value 2 2 3
Segments per Scheduler Schedule 50 50 3
Sequencer 4 4 3
Stage Group 8 8 3
Ramp Group 8 8 3
Hand-Off-Auto 16 16 3
Alternator 16 16 3
Device Control 16 16 3
User Defined Registers 2048 2048 3