Eaton easy800

4 Wiring with 800
4.4 Circuit diagram elements
108 Control Relay easy800 11/11 MN04902001Z-EN www.eaton.com
Table 14: Conversion table M, MB, MW, DW
Example 1: given Bit81 = M81; n = 81;
• Byte(MB) = n/8 = 10.125 ≈ 11
• Word(MW) =n/16 = 5.0625 ≈ 6
• Double word(DW) = n/32=2.5313 ≈ 3
Bit81 is contained in MB11, MW6 and DW3.
Example 2: given Byte21=MB21; n = 21;
• Bit(M) = 8n-7 to 8n = Bit161 to 168
• Word(MW) = n/2 = 10.5 ≈ 11
• Double word(DW) = n/4=5.25 ≈ 6
Byte21 contains the bits Bit161 to Bit168. Byte21 is contained in MW11 and
DW6.
Marker bit (M), marker bytes (MB), marker words (MW) and marker double
words (MD) are used in the circuit and function block diagram.
Expansion units for analog value measuring can be used on easy800
standard devices from device version number 04. The analog inputs and
outputs of the expansion units are read or written via permanently assigned
marker words:
given Bit
M n
Byte
MB n
Word
MW n
Double
word
DW n
Searched for
Bit (M) 8n-7 to
8n
16n-15
to 16n
32n-31
up to
32n
Byte (MB) n
8
2n-1 to
2n
4n-3
to 4n
Word (MW) n
16
n
2
2n-1
to 2n
Double word (DW) n
32
n
4
n
2
easy800 standard : n = 1 to 96
easy800-SWD: n = 1 to 128