Appendix A: Data Types - Metasys - LIT-12011931 - MS-KNXN89-0 - MS-MBUSN89-0 - MS-MODBUSN89-0 - MS-NIE2910-0 - MS-NIE2916-0 - MS-NIE2920-0 - MS-NIE2926-0 - MS-NIE2960-0 - MS-NIE2966-0 - MS-NIE3910-2 - MS-NIE3920-2 - MS-NIE4910-2 - MS-NIE4920-2 - MS-NIE5920-2 - MS-NIE5960-2 - MS-NIE89SW-0 - MS-NIE89SW-6 - TL-NIE-DVD - Bulb controller - VMD Generator Express

Data must be interpreted and converted according to the specific use of the device. Table 1 lists all supported data types that can be used by VMD Generator Express for reading a register from Modbus. The value of a coil is never converted; it is always 0 or 1.

Table 1. Data Type
Name	Description	Examples
Name	Description	Field Value (Hex)	Treated Value (Hex)	Final Value (Decimal)
SIGN16	Value with sign on 16 bits (-32768 to 32767)	FB2E	FB2E	-1234
UNSIGN16	Value without sign on 16 bits (0 to 65535)	FB2E	FB2E	64302
BIT n	Extract the single bit (n from 0 to 15) from the register	1234	1234 1001000110100 (BIT 2)	1
x BITS n-m	Extract the bits group (n from 0) from the register	1234	1234 1001000110100 (2 BITS 3-4)	2
HIGH BYTE	Extract the high part from the register (0 to 255)	F1F5	F1	241
LOW BYTE	Extract the low part from the register (0 to 255)	F1F5	F5	245
SIGN HIGH BYTE	Extract the high part from the register (-127 to 127)	F1F5	F1	-15
SIGN LOW BYTE	Extract the low part from the register (-127 to 127)	F1F5	F5	-11
SIGN32	Value with sign on 32 bits (-2147483648 to 2147483647)	FFA39EB2	FFA39EB2	-6054222
UNSIGN32	Value without sign on 32 bits (0 to 4294967295)	FFA39EB2	FFA39EB2	4288913074
SIGN32 WORD SWAP	Value with sign on 32 bits, inverting the words (-2147483648 to 2147483647)	FFA39EB2	9EB2FFA3	-1632436317
UNSIGN32 WORD SWAP	Value without sign on 32 bits, inverting the words (0 to 4294967295)	FFA39EB2	9EB2FFA3	2662530979
SIGN32 BYTE SWAP	Value with sign on 32 bits, inverting bytes in words (-2147483648 to 2147483647)	FFA39EB2	A3FFB29E	-1543523682
UNSIGN32 BYTE SWAP	Value without sign on 32 bits, inverting bytes in words (0 to 4294967295)	FFA39EB2	A3FFB29E	2751443614
SIGN32 ALL SWAP	Value with sign on 32 bits, inverting all bytes (-2147483648 to 2147483647)	FFA39EB2	B29EA3FF	-1298226177
UNSIGN32 ALL SWAP	Value without sign on 32 bits, inverting all bytes (0 to 4294967295)	FFA39EB2	B29EA3FF	2996741119
FLOAT	Value floating point on 32 bits (-3.4028E+38 to 3.4028E+38)	FF439EB2	FF439EB2	-2.6002E+38
FLOAT WORD SWAP	Value floating point on 32 bits, inverting the words (-3.4028E+38 to 3.4028E+38)	FF439EB2	9EB2FF43	-1.895E-20
FLOAT BYTE SWAP	Value floating point on 32 bits, inverting bytes in words (-3.4028E+38 to 3.4028E+38)	FF439EB2	43FFB29E	5.114E2
FLOAT ALL SWAP	Value floating point on 32 bits, inverting words and bytes in words (-3.4028E+38 to 3.4028E+38)	FF439EB2	B29E43FF	-1.842E-8
DOUBLE (*)	Value floating point on 64 bits (-1.7977E+308 to 1.7977E+308)	12345678 9ABCDEF0	12345678 9ABCDEF0	3.5127E-303
DOUBLE WORD SWAP (*)	Value floating point on 64 bits inverting the words (-1.7977E+308 to 1.7977E+308)	12345678 9ABCDEF0	DEF09ABC56781234	-2.1231E149
SIGN64 (*)	Value with sign on 64 bits (-9223372036854775808 to 9223372036854775807)	12345678 9ABCDEF0	12345678 9ABCDEF0	1311768467463790320
SIGN64 WORD SWAP (*)	Value with sign on 64 bits inverting the words (-9223372036854775808 to 9223372036854775807)	12345678 9ABCDEF0	DEF09ABC56781234	-2382234069183753676
UNSIGN64 (*)	Value without sign on 64 bits (0 to 18446744073709551615)	12345678 9ABCDEF0	12345678 9ABCDEF0	1311768467463790320
UNSIGN64 WORD SWAP (*)	Value without sign on 64 bits inverting the words (0 to 18446744073709551615)	12345678 9ABCDEF0	DEF09ABC56781234	16064510004525797940
MOD10_64 (*)	Module 10 calculation using 4 words with the order W1, W2, W3, W4. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	12345678 9ABCDEF0 4660 / 22136 / -21555 / -8464	(466010^3) + (2213610^2) + (-21555*10) + (-8464)
MOD10_64 WORD SWAP (*)	Module 10 calculation using 4 words with the order W4, W3, W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	DEF09ABC 56781234 -8464 / -21555 / 22136 / 4660	(-846410^3) + (-2155510^2) + (22136*10) + (4660)
MOD1K_64 (*)	Module 1000 calculation using 4 words with the order W1, W2, W3, W4. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	12345678 9ABCDEF0 4660 / 22136 / -21555 / -8464	(466010^9) + (2213610^6) + (-21555*10^3) + (-8464)
MOD1K_64 WORD SWAP (*)	Module 1000 calculation using 4 words with the order W4, W3, W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	DEF09ABC 56781234 -8464 / -21555 / 22136 / 4660	(-846410^9) + (-2155510^6) + (22136*10^3) + (4660)
MOD10K_64 (*)	Module 10000 calculation using 4 words with the order W1, W2, W3, W4. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	12345678 9ABCDEF0 4660 / 22136 / -21555 / -8464	(466010^12) + (2213610^8) + (-21555*10^4) + (-8464)
MOD10K_64 WORD SWAP (*)	Module 10000 calculation using 4 words with the order W4, W3, W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678 9ABCDEF0	DEF09ABC 56781234 -8464 / -21555 / 22136 / 4660	(-846410^12) + (-2155510^8) + (22136*10^4) + (4660)
MOD10_32	Module 10 calculation using 2 words with the order W1, W2. The single words are considered SIGN16 when used in the calculation.	12345678	12345678 4660 / 22136	(4660*10) + (22136)
MOD10_32 WORD SWAP (*)	Module 10 calculation using 2 words with the order W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678	56781234 22136 / 4660	(22136*10) + (4660)
MOD1K_32	Module 1000 calculation using 2 words with the order W1, W2. The single words are considered SIGN16 when used in the calculation.	12345678	12345678 4660 / 22136	(4660*10^3) + (22136)
MOD1K_32 WORD SWAP (*)	Module 1000 calculation using 2 words with the order W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678	56781234 22136 / 4660	(22136*10^3) + (4660)
MOD10K_32	Module 10000 calculation using 2 words with the order W1, W2. The single words are considered SIGN16 when used in the calculation.	12345678	12345678 4660 / 22136	(4660*10^4) + (22136)
MOD10K_32 WORD SWAP (*)	Module 10000 calculation using 2 words with the order W2, W1. The single words are considered SIGN16 when used in the calculation.	12345678	56781234 22136 / 4660	(22136*10^4) + (4660)

Note: (*)

¹ When high numbers are involved, precision may be lost.. The NAE internally handles the values as FLOAT32 (-3.4028E+38 to 3.4028E+38). Numbers outside the limits of FLOAT32 cannot represent a single Metasys object. For this reason, for the DOUBLE, MOD10, SIGN64 and UNSIGN64 data types, three subtypes are used to isolate the low (000 to 999), the middle (000000 to 999000), and the high part of the number. These sub-types are indicated as “1K” (LOW, MIDDLE, HIGH)