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Useful information

The following information is supplied elsewhere in this user's guide but is repeated here as a quick reference aid.  Each section is headed by the appropriate section number indicating where the original information can be found.

Commands and responses

CodeAs a command to ACC2-3

As a response from ACC2-3

AChange cycle enablePossible resposes to rack status request
B-Possible resposes to rack status request
C

Rack status request

Possible resposes to rack status request
DDatum mode selectPossible resposes to rack status request
E-Possible resposes to rack status request
F-Possible resposes to rack status request
GMechanism lock / unlockLock / unlock complete
H

Probe inhibit (1)

-
IProbe inhibit (2)-
J

Probe enable

-
KResetDatum mode 1
L-

Datum mode 2

MChange cycle disableChange cycle disabled
N-Change cycle and probe disabled
O--
P-Parked state
Q-Change cycle started
RSelf testRack disconnected
SAutochange status requestStand-alone mode probe enabled
T-Stand-alone mode disabled
U--
VVersion request 1-
WVersion request 2-
X-

Rack overtravelled

YMechanism lock

Probe enabled

ZMechanism unlock

Probe disabled

Command C: Rack status request

This command requests the status of the ACR1.  The response will be a string of four ASCII characters as shown below:

(i)(ii)CRLF

(i) and (ii) will be HEX code in ASCII format.

Hex codes

HexBinaryHexBinary
0

0000

8

1000

1

0001

9

1001

2

0010

A

1010

3

0011

B

1011

4

0100

C

1100

5

0101

D

1101

6

0110

E

1110

7

0111

F

1111

(i) This command specifies the state of the infra-red beams, rack overtravel and rack connected flags in the following formats (high for significance).

Rack status flags

Flag number7654
MeaningNot over-travelledFront beam madeRear beam madeRack connected

(ii) This command specifies the position of the motor-driven screwdrivers (high for significance).

Rack status flags

Flag number3210
MeaningLockedBacked offIntermediateUnlocked

e.g.

F4 = Rack ready, screwdrivers locked and backed off ready to receive a head and probe combination.

 

F1 = Rack ready, screwdrivers in unlocked position ready to receive an unloaded head.

Responses from ACC2-3

Normal status messages

Status

Message

Datum mode 1

K0

Datum mode 2

L0

Change cycle started

Q0

Parked state

P0

Cycle lock/unlock complete

G0

Change cycle disabled

M0

Change cycle and probe disabled

N0

CMM control probe enabled

Y0

CMM control probe disabled

Z0

Stand-alone mode probe enabled

S0

Stand-alone probe disabled

T0

 Error status messages

State

Message

Lock mechanism error

Q1

Lid time-out error

Q3

G message not received

Q4

Command not acceptable

Y5 *

Excessive entry speed

Q6

Invalid command

Y7 *

Rack overtravel

X8

Rack not connected

R9

Lock operation aborted

YA *

Change cycle operation aborted

YB *

The first character is the state in which the error occurred, the second character is the error code.

° These errors do not cause the system to remain in error mode, they are reported and the system returns to the previous mode.

* These error messages can have a different status byte (eg Q5, ZB).

Mode 4 - Error mode

LED errors

Key:

LED off

LED on

ACR1

LED

LME

-1

LTE

-3

GNR

-4

EES

-6

ROE

X8

RNC

R9

CCA

-B

Change cycle
Probe active
Cycle error
Lock error

ACC2-3

LED

LME

-1

LTE

-3

GNR

-4

EES
-6

ROE

X8

RNC

R9

CCA

-B

Rack ready
Rack active◊ *◊ *
Lock error
Overtravel error
Stop

*  These LEDs are ON so that a unique display is given for each error.

— Present mode or status.

System status

Key:

LED off ♦
LED on ◊
LED flashing ‡

Rack

LEDDatum mode 1Datum mode 2
Change cycle
Probe active
Cycle error
Lock error

ACC2-3

LEDDatum mode 1Datum mode 2
Rack ready
Rack active