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Australian Monitor DMA1 User Manual

Page 34

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S E R I A L R S 4 8 5 C O M U N I C AT I O N

PA G E 3 4

A M I S - D M A 1 I N S TA L L AT I O N & O P E R AT I O N M A N U A L

9.12 Basic protocol

Reading the data of the DMA1 from the control system

Transmission sequence

DMA1

Sending a command to the DMA1 from the Control System

Transmission sequence

Control System

DMA1

Control System

E

N

Q

A

D

D

C

M

D

D A T A

E

T

X

E

N

Q

A

D

D

C

M

D

E

N

Q

A

D

D

C

M

D

N

A

K

A

D

D

C

M

D

E

R

R

E

N

Q

A

D

D

C

M

D

D A T A

The DATA block

is inserted only

if provided for by

command used