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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.
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