Equitel E451 Manual de usuario descargar pdf (Pagina 16)

October 2013 – Ed.1.0

EQUITEL E400 Family – Control and communications protocol

Page 13

2.1.2. Inputs and outputs control

Both E401 and E451 have some auxiliary inputs and outputs. The difference between them is the number

and the possibility of configuring their address (input/output) and its initial status.

• E401 has up to 18 general purpose inputs/outputs, and any of them can be configured as input or

output by means of the suitable command. Please, check the specific documentation for a more

detailed description of the accessibility to these inputs/outputs.

• E451 has two contacts for external connections (one opto-isolated input and a relay output)

In both units their inputs or outputs can be controlled through the commands that we shall describe

below.

Depending on the equipment, E401 or E451, the list of characters in some specific commands parameters

has a different length, depending on the number of available inputs/outputs in the equipment.

• In E401 the parameter length will be an 18 characters chain, corresponding to the 18 accessible

pins in ascendant order: GPIO1, GPIO2, GPIO3,…., GPIO18.

• In E451 the parameter length is a 2 characters chain, corresponding to its two contacts: the first

one is the output and the second character is the input.

2.1.2.1. QRYPPORTCONFIG message

This is the message that the controller sends to consult all the inputs/outputs initial configuration:

Address: CC  E400

Syntax: Command

QRYPPORTCONFIG

Parameters:

None

In the case of E451, the two contacts configuration is fixed; the status and initial values being

determined by the hardware. The use of this command will send the controller this configuration back.

In the module E401, when the system starts for the first time, the available inputs/outputs have a

configuration by default. It can be consulted by the controller with this command at the beginning or

at any moment after having configured a change.

The answer of E400 to the controller after receiving this message, containing the configuration, is

PPORTCONFIG.

2.1.2.2. PPORTCONFIG message

This is the answer that any module E400 sends to the command QRYPPORTCONFIG.

Address: E400  CC

Syntax: Command

PPORTCONFIG

Parameters:

Address list (I: input, O: output, X: not used)

Initial status list (1, 0, X: not used / input)

Exemple : [E401]: PPORTCONFIG OOOOOOOOIIIIIIIOOO/00001100XXXXXXX000&

[E451]: PPORTCONFIG IO/X0&

It is important to take into account that the values list (second parameter) must have the same

number of elements as the address list (first parameter). However if a determined pin is configured as

input its initial value will depend on the hardware connected to that pin.

For each pin configured as input, the command will send an “I” address and an “X” value.

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