Mapping of the datatypes

All variables in zenon are derived from IEC data types. The following table compares the IEC datatypes with the datatypes of the PLC.

Mapping of the data types from the PLC to zenon data types

PLC	ASDU Type	zenon	Comment	Data type
M_SP_NA_1	1	BOOL		8
M_SP_TA_1	2	BOOL		8
M_SP_TB_1	30	BOOL		8
M_DP_NA_1	3	SINT		10
M_DP_TA_1	4	SINT		10
M_DP_TB_1	31	SINT		10
M_ME_NA_1	9	REAL		5
M_ME_TA_1	10	REAL		5
M_ME_TD_1	34	REAL		5
M_ME_NB_1	11	INT		1
M_ME_TB_1	12	INT		1
M_ME_TE_1	35	INT		1
M_ME_NC_1	13	REAL		5
M_ME_TC_1	14	REAL		5
M_ME_TF_1	36	REAL		5
M_BO_NA_1	7	DINT		3
M_BO_TA_1	64	DINT		3
M_BO_TB_1	33	DINT		3
M_IT_NA_1	15	DINT		3
M_IT_TA_1	16	DINT		3
M_IT_TB_1	37	DINT		3
C_SC_NA_1	45	BOOL	mirrors the command direction during execution	8
C_SC_TA_1	58	BOOL	mirrors the command direction during execution	8
C_DC_NA_1	46	SINT	mirrors the command direction during execution	10
C_DC_TA_1	59	SINT	mirrors the command direction during execution	10
C_SE_NA_1	48	REAL	mirrors the command direction during execution	5
C_SE_TA_1	61	REAL	mirrors the command direction during execution	5
C_SE_NB_1	49	INT	mirrors the command direction during execution	1
C_SE_TB_1	62	INT	mirrors the command direction during execution	1
C_SE_NC_1	50	REAL	mirrors the command direction during execution	5
C_SE_TC_1	63	REAL	mirrors the command direction during execution	5
C_BO_NA_1	51	DINT	mirrors the command direction during execution	3
C_BO_TA_1	64	DINT	mirrors the command direction during execution	3
C_IC_NA_1	100	BOOL	1 during execution	8
C_CS_NA_1	103	BOOL	1 during execution	8
F_SC_NA_1	122	STRING	Command for file transfer "DIR" or "GET"
F_DR_TA_1	126	STRING	response variable for file transfer

Data type

The property "Datenart" is the internal numerical name of the data type. It is also used for the extended DBF import/export of the variables.