Campbell Scientific CR10 CR10 Measurement and Control - Page 163

SECTION 12. PROGRAM CONTROL INSTRUCTIONS The source of data is the currently active Final Storage Area set by Instruction 80 (default = 0 or 1).NOTE: All memory pointers are positioned 8to the DSP location when the datalogger compiles a program. For this reason, Always retrieve uncollected data before making program changes. For example, assume the TPTR lags the DSP by less than 512 data points when the datalogger program is altered. On compiling, the TPTR is positioned with the DSP, losing reference to the data that was intended to be transferred to tape. The data is not automatically transferred and appears as a discontinuity in the data file. Until the ring memory wraps around and data overwrite occurs, the data may be recovered using the "8 Mode. This scenario is also true for the SPTR and data intended for a Storage Module. PARAM. DATA NUMBER TYPE 01: 2 DESCRIPTION Option Device 00 = Tape 09 = Tape all data to current DSP 80 = To the other Final Storage Area (New data since the last time) 81 = The other Final Storage Area (The entire active Final Storage Area) 0 (x) BAUD RATE CODES 300 baud 1 1200 baud 2 9600 baud 3 76800 baud ADDRESSED PRINT DEVICE, x = Baud code 1x = Printable ASCII 2x = Comma Delineated ASCII 3x = Binary FinalStorage Format 7N = Storage Module N (N=1-8; Section 4.5.1) 7N = Output File Mark to Storage Module N PIN_ENABLED pRtNT DEVICE, x = Baud code (SDE pulled high) 4x = Printable ASCII 5x = Comma Delineated ASCII 6x = Binary FinalStorage Format *** 97 INITIATE *** TELECOMMUNICATIONS lnstruction 97 is used to have the CRl0 initiate telecommunications in response to certain conditions. When the instruction is executed with the Interrupt disable flag set low, the CR10 will make a calland send the lD number specified in I Parameter (in ASCII at the specified baud rate). The lD number will be sent every 4 seconds until the CR10 receives a response or the time specified in Parameter 3 expires. The expected response is to have the lD sent back to the CR10, at which time the CRl0 will go into the normal telecommunications mode (Section 4) and the time limit on the callwill become inactive. In the normal telecornmunications mode, the CR10 waits for commands from the device it called. The CR10 will not send any data without first receiving a command to do so. CSI's TELCOM program (part of the PC208 Datalogger Support Software) enables IBM PCrff/AT/PS-2's or compatibles to automatically answer calls and retrieve data. When the CR10 receives a correct character, it restarts the 4 second timer used to determine when the lD is sent. There is then 4 seconds in which the CR10 waits to receive the next digit of the lD before it again sends the lD. The CR10 must receive the lD in the correct order without mistakes. lf an incorrect character is detected, the CR10 will immediately send the correct lD. lf a correct response is not received within the time allotted in Parameter 3, the CR10 will hang up. When either the RF or Hayes commands (DC112) options are specified, the time limit on the call (without a correct response) specified in Parameter 3 is timed from the start of the instruction and must include the dialing time. lf the correct response is not received, the CR10 willcontinue to make calls. The CR10 will repeat the calls at the fast interval specified by Parameter 4 for the number of retries specified in Parameter 5, after which the.calls will be attempted at the slow interval specified in Parameter 6. The actual delay between retries for both the fast and slow attempts has a random factor built in, which is added as an offset to the delay specified. The random factor prevents calls from different stations from occurring at the same time. This offset will range between 0 and one half of the delay specified. The resolution of the timer for these delays is the execution interval of the table in 12-7