Allen-Bradley MicroLogix 1200 Reference Manual page 289

• AND Mask is the mask used to reset the RTS control line. Bit 1
corresponds to the RTS control line. A value of "1" in the AND mask
resets the RTS control line; a value of "0" leaves the line unchanged.
The valid data range for the mask is from 0000 to FFFF hexadecimal.
• OR Mask is the mask used to set the RTS control line. Bit 1
corresponds to the RTS control line. A value of "1" in the OR mask
sets the RTS control line; a value of "0" leaves the line unchanged. The
valid data range for the mask is from 0000 to FFFF hexadecimal.
• Control is the control data file. See page 20-6.
• Channel Status displays the current status (0000 to 001F) of the
handshake lines for the specified channel. This status is read-only and
resides in the .POS field in the control data file. The following shows
how to determine the channel status value. In this example, the value
is 001F.
Channel 15 14 13 12 11 10 9
Status Bit
Handshake reserved
Control Line
0 0 0
Setting
Channel 0
Status
Word 2 of the Control Element = 001F
(1) The DCD handshake line is only supported on Channel 1.
• Error displays the hexadecimal error code that indicates why the ER
bit was set in the control data file. See page 20-30 for error code
descriptions.
Addressing Modes and File Types can be used as shown below:
Table 20.22 AHL Instruction Valid Addressing Modes and File Types
For definitions of the terms used in this table see Using the Instruction Descriptions on page4-2.
Data Files
Parameter
Channel
AND Mask • • • • •
OR Mask • • • • •
Control •
(1) The Control data file is the only valid file type for the Control Element.
Instruction Operation
This instruction executes on either a false or true rung. However a
false-to-true rung transition is required to set the EN bit to repeat the
instruction.
8 7 6
0 0 0 0 0 0 0
0 1
(1)
Function Files
ASCII Instructions
5 4 3 2 1
-- (1) -- RTS CTS
DCD
0 1 1 1 1
F
Address Address
Mode Level
• •
• • •
• • •
•
Publication 1762-RM001C-EN-P
20-21
0
1
•