DNF Controls GC-32 GPIO User Manual

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GC-32 GPIO CONTROLLER

Programming Manual

Revision History

05/09/12 First release

07/26/12 Added Table of Contents and product front & rear view

OVERVIEW................................................................................ 1

FRONT VIEW............................................................................. 2

REAR VIEW ............................................................................... 2

DEFAULT SETTINGS .................................................................. 2

PROTOCOL DESCRIPTION ......................................................... 3

GC-32 COMMAND SET ............................................................... 4

CONFIGURATION WEB PAGES................................................... 8

CONNECTORS- GPI, GPO ........................................................ 10

CONFIGURE GPIS FOR DRY/WET OPERATION ........................ 12

CONFIGURE GPOS FOR DRY/WET OPERATION ....................... 13

LIMITED WARRANTY .............................................................. 14

OVERVIEW

The GC-32 controls 32 individual GPOs (relay contact closure outputs) and monitors 32
individual GPIs (opto isolated inputs).

Upon receipt of a GPO control command the GC-32 will turn on or off the specified GPO,
or turn all GPOs on or off as specified within the command. The GPO command also
details the time that the GPO will stay on. A time of zero (0) will latch the GPO on. Any
other time 1 – 255 (x 10ms) will cause the GPO to turn off when the specified time in the
command elapses.

A GPI change of state notification will be sent automatically when a GPI change of state
is detected. The notification may include one or more GPIs and will contain the affected
GPI and its current state. The GPI state is communicated by an incrementing count. An
even count indicates that the GPI is off. An odd count indicates that t GPI is on. The
count will wrap from its maximum value to zero. If a client is not connected, GPI
notifications for that connection will be discarded.

The GC-32 is configured as a server and the 3
will establish a TCP/IP connection to port 50001 or 50002 to control and monitor the GC-

rd

party application is the client. The client

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32 GPOs and GPIs. The client is responsible for establishing and maintaining the
connection. In the event of a loss of connection, the client is responsible for re­establishing the connection and re-configuring the GC-32, if required.

The GC-32 has two programmable operating modes. In Mode 1, all GPIs and GPOs are
allocated to the port 50001 connection and identified as GPI 1 to GPI 32, and GPO 1 to
GPO 32. In Mode 2, GPIs 1 – 16 and GPOs 1 – 16 are allocated to the port 50001
connection and GPIs 17 – 32 and GPOs 17 – 32 are allocated to the port 50002
connection. The operating mode of the GC-32 may be changed at any time. Changing
the operating mode will clear any pending GPI change of state notifications.

The GC-32 can be configured to accept a connection from any IP address on port 50001
or 50002. Or, it can be configured to accept a connection from only the specific IP
address for each port indicated on the GC-32’s Remote Device Assignment web page.

FRONT VIEW

REAR VIEW

DEFAULT SETTINGS

DEFAULT ETHERNET CONFIGURATION

IP Address: 192.168.10.217
Subnet Mask: 255.255.255.0
Gateway: 192.168.10.1

Use the GC-32’s System Configuration web page to change the IP address, subnet, and
gateway. See section at the end of this document.

DEFAULT OPERATING MODE

The default operating mode is Mode 1. Use the Set Operating Mode command
described below to change the operating mode.

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PROTOCOL DESCRIPTION

The GC-32 command consists of the following components:

Header + command + data

NOTE- The “+” is used for readability only and should not be used in the

command

The Header is hexadecimal value 0x44 0x4E 0x46
Dot notation is used in this document to describe concatenated hexadecimal values.
The header is referenced below as 44.4E.46

The command is an 8 bit value and is described below.

Data is one or more 8 bit values, and is specific to each command as described below.

All multi-byte values are formatted as big endian (MSB…LSB).

The GC-32 responds to all commands with an ACK, NAK, or the requested data. If a
complete command is not received within 2 seconds, the GC-32 will respond with a
timeout error message.

GC-32 RESPONSES

ACK= 0x04

GC-32 response: 44.4E.46.04

NAK= 0x05

GC-32 response: 44.4E.46.05.ee where ee is one of the following error codes.

0x10= Invalid command format

0x11= Invalid command

0x12= Invalid data

0x13= Command timeout error

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GC-32 COMMAND SET

Set Operating Mode (Supported on port 50001 and 50002)

Command= 0x30

Data:

0= Select Mode 1

GPOs 1 – 32 and GPIs 1- 32 are allocated to port 50001. All commands on port 50002
that attempt to control or monitor will result in a NAK response

1= Select Mode 2
GPOs 1 - 16 and GPIs 1- 16 are allocated to port 50001.
GPOs 17 - 32 and GPIs 17- 32 are allocated to port 50002.

NOTE- On port 50002, the GPIs and GPOs are numbered 1 – 16 in Mode 2. Use

numbers 1 – 16 in all commands. Use of numbers 17 – 32 in commands will
result in an Invalid Data error message.

GC-32 will respond with ACK

Read Operating Mode (Supported on port 50001 and 50002)

Command= 0x31

Data:

No data is required

The GC-32 will respond with 44.4E.46.31.ss, where ss is the current operating mode. See
Set Operating Mode command for mode values.

GPO Control, Single GPO

Command= 0x60

Data:

GPO# 0x01 through 0x20

GPO State 0x00= OFF
0x01= ON

GPO On Time 0x01 through 0xFF (Internally, the On Time is multiplied by 10ms)

Send 44.4E.46.60.01.03.00 to latch on GPO #3

Send 44.4E.46.60.01.03.64 to turn on GPO #3 and then automatically turn them off
after 1 second.

GC-32 will respond with ACK

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GPO Control, All GPOs

Command= 0x61

Data:

0x01

GPO State 0x00= OFF
0x01= ON

GPO On Time 0x01 through 0xFF (Internally, the On Time is multiplied by 10ms)

Send 44.4E.46.61.01.01.00 to latch on all GPOs

Send 44.4E.46.61.01.01.64 to turn on all GPOs and then automatically turn them off
after 1 second.

GC-32 will respond with ACK

GPO Status, Single GPO

Command= 0x70

Data:

GPO# 0x01 through 0x20

The GC-32 will respond with 44.4E.46.70.gg.ss, where gg= the specified GPO
number and ss= the GPO’s current state.

GPO Status, All GPOs

Command= 0x71

Data:

0x01

The GC-32 will respond with 44.4E.46.71.cc.gg1.ss1.gg2.ss2…..ggN, ssN
where cc is the number of GPOs included in the response

gg1 is the GPO number and ss1 is its current status
gg2 is the next GPO number and ss2 is its status
ggN is the last GPO number and ssN is its status

For Mode 1, the GC returns GPO numbers 1 – 32
For Mode 2, on port 50001 and port 50002, the GC return GPO number 1 – 16
On port 50002, GPOs 1 – 16 are physical GPOs 17 – 32

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