GS-C200 datasheet(11/31 Pages) STMICROELECTRONICS

11 / 31 page

Error code

Type of error

Parity error when receiving one or more

characters, checksum error, or too long a

command string.

Command argument out of limit or not

requested.

Storage capacity overflow.

Not allowed or not executable command.

Overflow error during program execution

(GS-C200 only).

EEPROM programming error.

The number following the ”V” code depends on the

type of the received command.

When the GS-C answers to a ”V1” request (feed-

back the actual absolute position against the Home

position), the answer will be:

Vxxxxxxx

↓

where the xxxxxxx represent the absolute position.

When the GS-C answers to a ”V2” request (feed-

back the USER input/output status), the answer will

be:

Vxy

↓

where the x and y meaning is:

x = 1

User Input 1 = 1

x = 2

User Input 2 = 1

x = 4

User Input 3 = 1

y = 1

User Output1 = 1

y = 2

User Output 2 = 1

x = 4

User Output 3 = 1

The logic values of the inputs and outputs are

added together. For example the answer:

V36

↓

indicates the following USER I/O status:

UI1 =

UO1 =

UI2 =

UO2 =

UI3 =

UO1 =

The presence of Checksum character, whose value

is calculated by using the method described in the

previous example, is conditioned by the CHS pin

status.

When CHS is grounded (either by a logic signal or

by a strap to ground) the checksum is deleted.

The string terminator is, as in the previous case, a

Carriage Return.

11/31

THE SEQUENCER-DRIVER INTERFACE

The interface to the Sequencer-Driver and, through

it, to the mechanical environment, consists of eight

logic signals (5 outputs and 3 inputs) which enable

the GS-C intelligent controller to interface the GS-

D200 or the GS-D200S modules as well as any

Sequencer Drivers currently available. The eight

signals can be divided into two groups, named

respectively:

PRIMARY SIGNALS

UTILITY SIGNALS

The primary signals are those necessary for the

correct system operation:

RESET

Output to reset the Sequencer-

Driver.

CLOCK

Step clock output.

DIR

Direction output.

ENABLE

Step enable input.

The function of each signal is described in detail in

section PIN DESCRIPTION on page 4/31; it will be

shown later that the Step Enable Input in conjunc-

tion with the position sensor of the motor, allows the

implementation of closed loop systems (see para-

graph Closed Loop Operation on pag. 27). The

Utility signals allow the optimization of the driving

system and the minimization of the hardware. They

are:

MOV

Movement in execution output.

RAMP

Ramp in execution output.

EOT

Mechanical End of Travel input.

HOME

Electrical Home Position input.

By using these signals it is possible to correctly

define the system starting point or reference posi-

tion, or to change the current in the motor windings

during the acceleration and deceleration phases in

order to optimize the motor performance.

A typical example of the utility signals implementa-

tion is given here. Let’s suppose that the required

speed profile is as shown in fig. 5.

Figure 5. Speed-Time Profile.

GS-C200 / GS-C200S

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