Equitel E451 Manuel d'utilisateur télécharger pdf (Page 18)

October 2013 – Ed.1.0

EQUITEL E400 Family – Control and communications protocol

Page 15

2.1.2.6. ACK_ WRITEPPORT message

This is the message that E400 has to send back as the answer to a WRITEPPORT.

Address: E400  CC

Syntax: Command

ACK_WRITEPPORT

Parameters: None

2.1.2.7. READPPORT message

This is the message that the controller sends to consult the value of the pins configured as

inputs/outputs.

Address: CC  E400

Syntax: Command

READPPORT

Parameters: None

E400 sends the message PPORT with each input/output value.

2.1.2.8. PPORT message

This is the answer of E400 sends to the controller after receiving a READPPORT.

Address: E400  CC

Syntax: Command

PPORT

Parameters: List of input/output values(1, 0, X: not used)

Example: [E401]: PPORT X10XXXXXXXXXXXXX0&

[E451]: PPORT 11&

In the case of the pins configured as input, this message sends the read pin value. If it is an output, it

sends back its final status.

For the unused pins, we will use as parameter the value “X”.

In the case of E451 the parameter will have two characters. The first one is the read value in the opto-

isolated input and the second one corresponds to the value in which we have left the relay output.

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Equitel E451 Manuel d'utilisateur Page 18