CD200D II 4-17 All rights reserved © ALTRONIC, LLC 2017
12
12.0 RS-485 COMMUNICATIONS, MODBUS RTU
12.1 The CD200D is compliant to the Modicon Modbus RTU standard. Maximum
number of registers that can be read at one time is limited to 32. Maximum
number of booleans that can be read at one time is limited to 256. All com-
munications are 8 data bits, no parity, 1 stop bit. The baud rate is 9600. The
MODBUS address list follows:
12.2 24 READ-ONLY STATUS BITS
READABLE IN MULTIPLES OF 8 BITS
STARTING AT 8-BIT BOUNDARIES
ADDRESS
FUNCTION
10001
Syncing
10002
InSync1
10003
InSync2
10004
Purging
10005
Trying
10006
Firing
10007
LockOut
10008
FIRED
10009
Cranking
10010
Running
10011
Wrong Disk
10012
GLead Shutdown Grounded
10013
Remote
Shutdown Present
10014
GLead Shutdown Logged
10015
Remote Shutdown Logged
10016
Overspeed Shutdown Logged
10017
WDOG1 Reset Latched
10018
WDOG2 Reset Event
10019
CheckSum Error
10020
LOW Supply Voltage
10021
No Charge
10022
Open Primary
10023
Shorted Primary
10024
Open Secondary
WARNING: Writable Modbus registers
such as ‘0XXXX’ and ‘4XXXX’ directly
reference the CD200D non-volatile
memory. Non-volatile memory has a
useful life of ~100,000 Write/Erase
cycles. Any device writing to these reg-
isters must take care to not exceed the
maximum number of Write/Erase cycles.
