Control Techniques Epsilon EP-P, Справочное руководство

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Epsilon EP-P Drive Reference Manual
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Revision A4 www.controltechniques.com
Figure 82: Writing to the User Bit Register
The Mask is only used when WRITING to the 32-bit parameter, BitRegister.#.Value. When reading the 32-bit value, all bits are
read regardless of the mask.
Figure 83: User Bits Read/Write Process
3.24.3 Configuring the User Bit Mask Register
The User Bit Mask is a 32-bit parameter that can be configured through Power Tools Pro, in the User Program, or over the
communications network. The default value for the Mask register is 0xFFFFFFFF (HEX), or all bits ON. To change the Mask
value using PowerTools Pro, navigate to the Mask tab on the User Bits view, see Figure 84.
In the User Bits Mask view, each bit of the Mask can be set to 0 or 1 individually. ON (or 1) is indicated by a shaded square,
and OFF (or 0) is indicated by an empty square. Bit 31 is the most significant bit in the word, and bit 0 is the least significant
bit. If the bit is shaded, it means that particular bit will be passed through when written.
Each additional group of 32 User Bits that are added, a new Mask parameter will appear for that group. Mask 0 will control the
mask for User Bits 0 through 31. Mask 1 will control the mask for Bits 32 through 63. This sequence repeats for each
additional 32 bits that is added.
0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0
0 15 Bit #31
0 1 1 0 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 0 1 0 1 0 1 1 0
1 1 0 0 0 0 0 0 0 1 0 1 0 0 0 0 1 1 0 1 0 1 1 1 0 1 0 1 0 1 0 0
Original
Value
Value written
over network
32-bit Mask
Result stored
in each bit
Network
Master
Write
Read
Epsilon EP Drive
Written data is AND’ed with the Mask
and then written into 32-bit Value.
Read data is read directly from the
32-bit Value and bypasses the Mask.
Mask
Value
AND