Campbell Scientific CR800 and CR850 Measurement and Control Systems User Manual
Page 517
Appendix B. Status Table and Settings
517
instruction (ModBus, DNP3, generic protocols), CommsActive will remain TRUE as long as
characters are received at a rate faster than every 40 seconds. In addition, PPP will activate its COM
port with a 31 minute timeout. When PPP closes, it will cancel the timeout and set CommsActive as
FALSE. Further, if there is a dialing process going on, CommsActive is set to TRUE. One other
event that causes ComME to be active is the GOES instruction. In conclusion, the name
"CommsActive" can be misleading. For example, if there are no incoming characters to activate the
40-second timeout during which time CommsActive is set to TRUE and only outputs data, then
CommsActive is not set to TRUE. For protocols other than PakBus,the active TRUE lingers for 40
seconds after the last incoming characters are processed. For PPP, the COM port is always TRUE so
long as PPP is open.
16
When the SerialOpen() instruction is used, CommsConfig is loaded with the format parameter of
that instruction. PakBus communication can occur concurrently on the same port if the port was
previously opened (in the case of the CP UARTS) for PakBus, or if the port is always open (CS I/O 9
pin, and RS-232) for PakBus, the code is 4.
17
The value shown is the initial baud rate the CR800 will use. A negative value will allow the CR800
to autobaud but will dictate at which baud tate to begin. When doing autobaud, the CR800 measure the
baudrate, then sets the comm port to that baud.
18
A list of up to eight PB addresses for routers that can act as central routers. See Device
Configuration Utility software for more information.
19
(1) 5000-mV range 250-us integration
(2) 2500-mV range 250-us integration
(3) 250-mV range 250-us integration
(4) 25-mV range 250-us integration
(5) 7_5-mV range 250-us integration
(6) 2.5-mV range 250-uS integration
(7) 5000 mV range 60-Hz integration
(8) 2500-mV range 60-Hz integration
(9) 250-mV range 60-Hz integration
(10) 25-mV range 60-Hz integration
(11) 7_5-mV range 60-Hz integration
(12) 2.5-mV range 60-Hz integration
(13) 5000-mV range 50-Hz integration
(14) 2500-mV range 50-Hz integration
(15) 250-mV range 50-Hz integration
(16) 25-mV range 50-Hz integration
(17) 7_5-mV range 50-Hz integration
(18) 2.5-mV range 50-Hz integration