Campbell Scientific CR850 CR800 and CR850 Measurement and Control Systems - Page 489
AcceptDataRecords, Broadcast
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Appendix A. CRBasic Programming Instructions • Com310 • ComSDC7 • ComSDC8 • ComSDC10 • ComSDC11 • Com1 (C1,C2) • Com2 (C3,C4 Com32 - Com46 (available when using a single-channel expansion peripheral. See the appendix Serial Input Expansion Modules ) Baud rate on asynchronous ports (ComRS-232, ComME, Com1, Com2, and Com32 - Com46) default to 9600 unless set otherwise in the SerialOpen() instruction, or if the port is opened by an incoming PakBus® packet at some other baud rate. Table Asynchronous Port Baud Rates (p. 492) lists available baud rates. In general, PakBus® instructions write a result code to a variable indicating success or failure. Success sets the result code to 0. Otherwise, the result code increments. If communication succeeds, but an error is detected, a negative result code is set. See CRBasic Editor Help for an explanation of error codes. For instructions returning a result code, retries can be coded with CRBasic logic as shown in the GetVariables() example in CRBasic example Retries in PakBus Communications (p. 492). The Timeout argument is entered in units of hundredths (0.01) of seconds. If 0 is used, then the default timeout, defined by the time of the best route, is used. Use PakBusGraph Hop Metrics to calculate this time (see datalogger support software (p. 76) ). Because these communication instructions wait for a response or timeout before the program moves on to the next instruction, they can be used in a SlowSequence scan. A slow sequence will not interfere with the execution of other program code. Optionally, the ComPort parameter can be entered preceded by a dash, such as -ComME, which will cause the instruction not to wait for a response or timeout. This will make the instruction execute faster; however, any data that it retrieves, and the result code, will be posted only after the communication is complete. AcceptDataRecords Sets up a CR800 to accept and store records from a remote PakBus datalogger. Syntax AcceptDataRecords(PakBusAddr, TableNo, DestTableName) Broadcast Sends a broadcast message to a PakBus network. Syntax Broadcast(ComPort, Message) 489