Thermo Scientific APEX 100, User Manual

Page: 351 / 442

Thermo Scientific APEX User’s Guide
Page 351
Understanding
Registers
The first part of this section gives you a quick overview of way the Modbus
Communications Card uses registers to control and/or monitor APEX functions. The
second part gives you step-by-step instructions about how to use the Modbus registers
to change products, get summary statistics (such as the total reject count), and back up
all your important APEX settings. And the final part, which is presented in the form of
table, gives you a complete summary of all Modbus registers used by the APEX.
Data Handling
This section gives you a quick overview of way the Modbus Communications Card uses
registers to control and/or monitor APEX functions, and how to interpret register values.
Supported Operation Codes
Here is a list of the operation codes supported by the Modbus.
Modbus function Function code
Read coil 1
Read input discretes 2
Read multiple registers 3
Read input registers 4
Write coil 5
Write single register 6
Force multiple coils 15
Force multiple registers 16
Mask write register 22
Read/write registers 23
Exception code Name
0x01 Illegal function
0x02 Illegal data address
0x03 Illegal data value