Bosch 6000 User's Guide download pdf (Page 144)

Chapter 4. User Interface Options

129

Thumbwheels

You can connect the controller's programmable I/O to a bank of thumbwheel switches to

allow operator selection of motion or machine control parameters.

The controller allows two methods for thumbwheel use. One method uses Compumotor's

TM8 thumbwheel module or IM32 input module. The other allows you to wire your own

thumbwheels.

The TM8 requires a multiplexed BCD input scheme to read thumbwheel data. Therefore, a

decode circuit must be used for thumbwheels. Compumotor recommends that you purchase

Compumotor's TM8 module if you desire to use a thumbwheel interface. The TM8 contains

the decode logic; therefore, only wiring is needed.

The commands that allow for thumbwheel data entry are:

INSTW ......... Establish thumbwheel data inputs (TM8)

OUTTW ......... Establish thumbwheel data outputs (TM8)

TW .............. Read thumbwheels or PLC inputs

INPLC ......... Establish PLC data inputs (Other thumbwheel module)

OUTPLC ....... Establish PLC data outputs (Other thumbwheel module)

Using the TM8 &

IM32 Modules

To use Compumotor's TM8 or IM32 Modules, follow the procedures below.

Step 1

Wire your TM8 or IM32 module to the controller as shown in your product's Installation

Guide.

Step 2

Use the commands below to configure your controller:

OUTTW1,1-3,0,10 ; Configure thumbwheel output set 1: outputs 1-3 are

; strobe outputs, 10 ms strobe time per digit read.

; Strobe time is 10 ms (minimum recommended for TM8).

INSTW1,1-4,5 ; Configure thumbwheel input set 1:

; inputs 1-4 are data inputs, input 5 is a sign input.

INLVL00000 ; Inputs 1-5 configured active low

Step 3

Set the thumbwheel digits on your TM8 module to +12345678. To verify that you have wired

your TM8 module(s) correctly and configured your controller I/O properly, enter the following

commands:

VAR1=TW1 ; Assign data from all 8 thumbwheel digits to VAR1

VAR1 ; Displays the variable (*VAR1=+0.12345678). If you do not

; receive this response, return to step 1 and retry.

Using your own

Thumbwheel

Module

As an alternative to Compumotor's TM8 Module, you can use your own thumbwheels. The

controller's programming language allows direct input of BCD thumbwheel data via the

programmable inputs. Use the steps below to set up and read the thumbwheel interface. Refer

to the 6000 Series Software Reference for descriptions of the commands used below.

Step 1

Wire your thumbwheels according to the schematic diagram provided in your product's

Installation Guide.

Step 2

Set up the inputs and outputs for operation with thumbwheels. The data valid input will be

an input which the operator holds active to let the controller read the thumbwheels. This

input is not necessary; however, it is often used when interfacing with PLCs.

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Bosch 6000 User's Guide Page 144

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