Sutron XLink 100, Operation & Maintenance Manual

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XLINK 500/100 Operations & Maintenance Manual page # 174
Diagnostic 0x08 Return Bus Message Count 0x0B
Diagnostic 0x08 Return Bus Comm Error 0x0C
Diagnostic 0x08 Return Bus Exception Count 0x0D
Diagnostic 0x08 Return Slave Message Count 0x0E
Diagnostic 0x08 Return Slave Broadcast Count 0x0F
Diagnostic 0x08 Return Bus Char Overrun Count 0x12
Write Multiple Registers 0x10
Sutron Function Code 0x41 Get Log GL
Sutron Function Code 0x41 Get File GF
Sutron Function Code 0x41 Send File SF
18.4.1. Identifying Registers
There are two types of data that can be accessed using the Modbus protocol. These include
Holding and Input registers.
Holding Registers
Holding registers are reserved for the purpose of setting and getting data such as the date and
time and diagnostic counts if the ability to send the above Diagnostic (0x08) command is not
available. The following table identifies the holding registers and their locations. Each of these
registers is an unsigned 16-bit value (if readings registers using an Xpert, set the data type to
ushort).
Data Register Valid Data Values
Hour of current time 1001 0 – 23
Minute of current time 1002 0 – 59
Second of current time 1003 0 – 59
Year of current time 1004 > 2000
Month of current date 1005 1 – 12
Day of current month 1006 1 – 31
Recording status
1007 1 means running
0 means stopped
Reset Unit 1008 Write 1 to reset
Modbus Protocol 1009
0 – RTU
1 – ASCII
Force Measurement * 1010 0 – force all active
measurements
1-32 force that
measurement only
Bus Message Count 1011 Read Only
Bus Comm Error 1012 Read Only
Slave Exception Count 1013 Read Only
Slave Message Count 1014 Read Only
Broadcast Message Count 1015 Read Only
Char Overrun Count 1016 Read Only
*Note: When forcing a measurement, be sure to wait the proper amount of time for a
measurement to finish before requesting data.