Experimental Physics and
Industrial Control System

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<== Date ==>		<== Thread ==>

Subject:	TD20 classic : Turbo molecular pump controller
From:	"최숙" <[email protected]>
To:	[email protected]
Date:	Mon, 2 Jun 2014 14:47:10 +0900

I need helps... ^.^

I have a TD20 Classic turbo molecular pump controller... it was produced by Leybold..

First, I want to signal test using terminal program like hyperterminal..

It uses USS protocol.. I got a signal hexacode... I attached the document.

It can or can not ?

Second, I want to control by SIEMENS PLC or AB PLC ...then integrate into EPICS..

Anyone who got a source.. control TD20 classic TMP controller... help me..

Sincerely, Suk Choi

Examples of a USS protocol at RS 232 interface

To understand the structure of a USS protocol are some examples written inside this document. Please see in addition the interface manual.

Once the master (PC) has sent a telegram to the slave (CT), the answer will follow after a delay of 10 ms in case the telegram was received correctly

An empty telegram without any task to the slave:

Master: 02 16 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 14

Slave : 02 16 00 00 00 00 00 00 00 00 00 02 01 00 00 00 1E 00 00 00 16 00 E9 F6

The slave will only transmit his processwords.

Calculation of the BCC for upper example:

BCC :0000 0000 xor

byte1 :0000 0010 =

BCC :0000 0010 xor

byte2 :0001 0110 =

BCC :0001 0100 xor

byte3 :0000 0000 =

BCC :0001 0100 xor

...

BCC :0001 0100 xor

byte23:0000 0000 =

BCC :0001 0100

Examples of what your interface should be able to do:

Reading of parameters:

For example the value of parameter 23 should be read out. This parameter shows the pump type:

Master: 02 16 00 10 17 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 13

Slave : 02 16 00 10 17 00 00 00 00 00 04 02 01 00 00 00 1E 00 00 00 15 00 E9 F6

Byte 3-4 contens the type of request (please see the interface manual) and the parameter number. The slave answers with the value "00 00 00 04". This is according to the manual a TW 300 (please see converter manual).

Writing of parameters:

According to the pump type the program will select the right maximum speed out of the list. Imagine the pump should run with 1000Hz. Parameter 24 appoints the maximum speed:

Master: 02 16 00 20 18 00 00 00 00 03 E8 00 00 00 00 00 00 00 00 00 00 00 00 C7

Slave : 02 16 00 10 18 00 00 00 00 03 E8 02 01 00 00 00 1E 00 00 00 15 00 E9 16

The slave answers with the new value.

Start the pump:

You will start the pump by using the control-word (please see the interface manual).

Master: 02 16 00 20 18 00 00 00 00 03 E8 04 01 00 00 00 00 00 00 00 00 00 00 C2

Slave : 02 16 00 10 18 00 00 00 00 03 E8 02 01 00 00 00 1E 00 00 00 15 00 E9 16

Inside this example also the maximum speed of the pump will be set.

Stop the pump:

You will stop the pump by using the control-word (please see the interface manual).

Master: 02 16 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 10

Slave : 02 16 00 00 00 00 00 00 00 00 00 8E 24 03 13 00 1F 00 18 00 16 00 E3 5C