Campbell Scientific CR10X TD Operating System Addendum for CR510, CR10X, and C - Page 45
Program Control, Instructions
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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. 12-1