Campbell Scientific TD Operating System Addendum for CR510, CR10X, and CR23X - Manual (Page 45)

12-1
Section 12. Program Control
Instructions
The TD operating system does not use the output Flag 0. Commands dealing with it are
not valid.
Instructions 96 – Serial Output, 98 – Send Character, and 111 – Load Program from
Flash, are NOT in the TD operating system.
The instructions described in this section are only in the PakBus operating system.
Wireless Networks
More recent CR10X, CR510, and CR23X dataloggers with the PakBus
operating system use the PakBus communications protocol. In addition to
providing a robust means of packet based communication, the protocol allows
transfer of input location data from one datalogger to another, or from a
Campbell Scientific wireless sensor/datalogger (CR200 series datalogger) to a
"host" (or "master") TD datalogger.
The following is some general information on the requirements for successful
communication in a PakBus network.
Datalogger Requirements
PakBus communication requires the current PakBus operating system in the
CR10X, CR510, or CR23X datalogger. All CR200 Series dataloggers are
capable of PakBus communication.
All dataloggers in the PakBus network require a unique address. The address
for TD dataloggers is set in the *D15 mode. The address for the CR200
datalogger's is set using Pakcom software or LoggerNet version 2.1 or greater.
Communication Notes
PakBus dataloggers are also capable of Modbus communication. The Modbus
packet can ride on top of the PakBus packet or can be send independently.
Instruction 190 is used to set up a datalogger as a Modbus master device. The
datalogger's Modbus address is set in the *D8 mode of the datalogger. The
Modbus and Pakbus addresses for a datalogger cannot be the same.
In order to communicate to a datalogger via another datalogger from
LoggerNet's Connect window (e.g., communicating with a CR205 via a
CR10XTD-PB) the datalogger through which you will be communicating must
be set as a router. This is done by entering the number of remote dataloggers
that the router will be connecting to in the *D15 mode, parameter 2.
The PakBus instructions described in this section are often used in combination
with a CR200 series datalogger and the RF400 series spread spectrum radio.
Table 12-1 lists some of the advantages and disadvantages of different methods
of transferring data.