Campbell Hausfeld SM4M - Manual (Page 10)

SM4M/SM16M Storage Module User Guide
1-4
The SM can store data either under program control (Instruction 96) or under user
control (*8 Mode with CR500/510, CR10/10X and CR23X, *9 Mode with 21X
and CR7). Datalogger programs can be stored in and retrieved from the Storage
Module using the *D Mode. The CR500/510, CR10/10X and CR23X *9 Mode
enables the user to directly execute commands such as: change address, view data,
etc. (See your datalogger manual for full details.)
1.4.2 Operation with Dataloggers with Older Operating Systems
(Printer-Enable Method)
In the Printer-Enable Method (see Figure 1-3), the Storage Module stores all data
received (on pin 9) while the printer enable line (pin 6) is high. The Storage
Module automatically detects the baud rate from the sending device (9600 or
76800 only). The datalogger cannot detect if the SM is connected. Data is sent
whether or not the SM is connected.
21X
CR7X
CR7
CR21
DSP4
SM4M/
16M
Figure 1-3 Pin-Enable Operations
Data can be stored in the SM under program control (Instruction 96 or *4 Mode)
or under user control (*9 Mode). Operations with the DSP4 Heads Up Displays
also use the Printer-Enable Method. (See Section 3).
1.4.3 Data Retrieval / Telecommunication Command State
Data retrieval and other interactive operations with a computer take place in the
Telecommunications command state – see Figure 1-4. PC208W uses the
Telecommunications Commands for data retrieval. Direct telecommunication
commands can also be sent from SMS (part of PC208W) in the Terminal
Emulator mode. A list of direct telecommunication commands is shown in
Appendix B.
Computer/
Terminal
SM4M/
16M
Figure 1-4 Telecommunications Command State