Carel EVD4, User Manual, Page: 26 / 48

26
ENGL
ISH
EVD
4
+030220227 - rel. 2.1 - 12.06.2008
Error messages (exceptions)
01 ILLEGAL FUNCTION
The requested function is not available on the device.
02 ILLEGAL DATA ADDRESS
The requested address, or one of the requested addresses for a read command is
invalid. This message will be returned as a response whenever attempting to read an
unavailable address.
03 ILLEGAL DATA VALUE
Whenever attempting to write a read-only variable, or alternatively when attem
pting to individually write a coil with values that are not envisaged by the protocol
(other than FF00 and 0000).
NOTE: in all other cases, the device does not check the values of the variables that
can be written, but simply whether the message is valid, using the CRC; the correct
ness of the values is checked by the supervisor.
06 SLAVE DEVICE BUSY
If for example the command involves executing actions that require a certain time
to be completed. In this case the supervisor must send the command again subse
quently.
3.6.4 Supervisor variable mapping
The supervisor variables have been grouped into two main classes: read-only, which are reserved the
lower ModBus addresses, and read/write, according to the following table:
MODBUS VARIABLES (EVD0001460)
MODBUS TYPE MODBUS INDEX CAREL TYPE
REGISTER 1 to 16 ANALOGUE (R ONLY)
REGISTER 50 to 86 ANALOGUE (R/W)
REGISTER 128 to 150 INTEGER (R ONLY)
REGISTER 163 to 231 INTEGER (R/W)
COIL 1 to 20 DIGITAL (R ONLY)
COIL 51 to 84 DIGITAL (R/W)
The correspondence between the Carel supervisor addresses of the variables and the ModBus device
addresses is as follows (for a complete description of the parameter corresponding to the variables, see
“APPENDIX II DESCRIPTION OF THE PARAMETERS”):
Carel type R/W Spv address ModBus type R/W ModBus address
A R 4 REGISTER R 1
A R 5 REGISTER R 2
A R 6 REGISTER R 3
A R 7 REGISTER R 4
A R 8 REGISTER R 5
A R 9 REGISTER R 6
A R 10 REGISTER R 7
A R 13 REGISTER R 8
A R 14 REGISTER R 9
A R 15 REGISTER R 10
A R 16 REGISTER R 11
A R 17 REGISTER R 12
A R 18 REGISTER R 13
A R 37 REGISTER R 14
A R 38 REGISTER R 15
A R 39 REGISTER R 16
A R/W 1 REGISTER R/W 50
A R/W 2 REGISTER R/W 51
A R/W 3 REGISTER R/W 52
A R/W 11 REGISTER R/W 53
A R/W 12 REGISTER R/W 54
A R/W 21 REGISTER R/W 55
A R/W 22 REGISTER R/W 56
A R/W 23 REGISTER R/W 57
A R/W 24 REGISTER R/W 58
A R/W 25 REGISTER R/W 59
A R/W 26 REGISTER R/W 60
A R/W 27 REGISTER R/W 61
A R/W 28 REGISTER R/W 62
A R/W 29 REGISTER R/W 63
A R/W 30 REGISTER R/W 64
A R/W 31 REGISTER R/W 65
A R/W 32 REGISTER R/W 66
A R/W 33 REGISTER R/W 67
A R/W 34 REGISTER R/W 68
A R/W 35 REGISTER R/W 69
A R/W 36 REGISTER R/W 70
A R/W 40 REGISTER R/W 71
A R/W 43 REGISTER R/W 72
A R/W 44 REGISTER R/W 73
A R/W 45 REGISTER R/W 74
A R/W 46 REGISTER R/W 75
A R/W 47 REGISTER R/W 76