User manual

Chapter 8 MODBUS Communications ASDA-A User Manual
4th Edition 2005/11/30, HE03 © DELTA ELECTRONICS, INC. ALL RIGHTS RESERVED
8-6
Input DI8 DI7 DI6 DI5 DI4 DI3 DI2 DI1
State 1 1 0 1 1 0 0 0 = D8 Hex
(Keypad, Communication or UI)
(External CN1
Communication)
or = 216 Dec (Communication or UI only)
Please see Chapter 4-4-5 DI Signal Display Diagnosis Operation for display layout of the Digital Signal
selection.
The Digital Input Control Contact parameter, P3-06 also works in conjunction with the Multi Function Digital
Input parameter P4-07 which has several functions.
The contents of P4-07 is "read only" via the drive keypad and will display the state on or off ("blank" or "|")
of the eight Digital Inputs which have been set in accordance to P3-06. For Example; if P3-06 has been set
to 0 (All DI is external and via the CN 1 interface) and the P4-07 display is indicating the following:
_ | | | _ _ _ | (for the manual this picture should be similar to the one shown on page 4-8
(Ch 4-4-5)
The Digital Inputs 1, 5, 6, & 7 are "on" (high) and Digital Inputs 2, 3, 4, & 8 are "off" (low).
If the contents of P4-07 is being read via communication the output will be a decimal number that will
represent the "binary" display. Therefore in the previous example the decimal number being read would be
113.
However, in the communication mode the user can write to P4-07 to turn the Digital Inputs either "on" or
"off". Again this achieved by sending a decimal or hexadecimal number that corresponds to the binary
representation of the Digital Inputs being addressed. Therefore in the previous example 113 or 71 hex
would be sent to 407H to switch on Digital Inputs 1, 5, 6, & 7. Remember, previous to this P3-06 would
have been set to either 255 / FF or 113 / 71 (This sets the Digital Inputs 1, 5, 6, & 7 to communication).