Metrohm 730 Sample Changer User Manual Page 158
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4.11 Properties of the RS232 Interface
730 Sample Changer, Detailed Description
155
4.11 Properties of the RS232 Interface
4.11.1 Data Transfer Protocol
The Sample Changer is configured as DTE (Data Terminal
Equipment).
The RS232 interface has the folllowing technical specifications:
• Data interface according to the RS232C standard, adjustable
transfer parameters, see pages 86 and 143.
• Max. line length: 80 characters + C
R
L
F
• Control characters: C
R
(ASCII DEC 13)
L
F
(ASCII DEC 10)
XON (ASCII DEC 17)
XOFF (ASCII DEC 19)
• Cable length: max. approx. 15 m
Start 7 or 8 Data Bit Parity Bit 1 or 2 Stop Bit
Only a shielded data cable (for example, METROHM D.104.0201)
may be used to couple the 730 Sample Changer with foreign de-
vices. The cable shield must be properly grounded on both instru-
ments (pay attention to current loops; always ground in a star-
head formation). Only plugs with sufficient shielding may be used
(for example, METROHM K.210.0001 with K.210.9004).
4.11.2 Handshake
Software-Handshake, SWchar
Handshake inputs on the changer (CTS, DSR, DCD) are not
checked.
Handshake outputs (DTR, RTS) are set by the changer.
As soon as an L
F
is recognized the changer sends XOFF. After
this it can still receive and store 6 characters.
The changer also sends XOFF when its input buffer contains 60
characters. After this it can receive 22 extra characters, (including
L
F
).
If the transfer is interrupted for the time of 4 characters after the
changer has sent XOFF, the character string previously received
will be processed even if no L
F
has been sent.
- 730 Sample Changer 1
- Table of Contents 2
- 1 Overview 4
- 730 Sample Changer, Overview 5
- 1.3 Instrument Description 6
- 1.3.2 Rear View 7
- 1.3.3 Sensors 8
- 11.3.3.5 .5 The Swing Head 9
- 2 Installation 10
- 2.3 Safety Considerations 12
- 2.4.3 Tubing Fixation 15
- 2.4.4 Magnetic Stirrers 15
- 2.4.5 Sample Racks 15
- 2.5 Integration 17
- 2.5.1 Remote Connections 18
- 683 Pump Unit 24
- Cable 6.2135.000 26
- Cable 6.2134.000 26
- 1 2 3 4 5 6 7 8 1 2 3 4 5 6 28
- 3 Introduction 30
- Basic Configuration 31
- >, <1> or <2> 32
- Rack Configuration 33
- The Method 34
- 3.2 Configuration 38
- 3.2.2 Rack Definition 40
- 3.2.3 Dosing Units 42
- 33.2.2.4 .4 RS232 Interface 43
- 3.3 Swing HeadSwing Head 45
- MOVE : sample <ENTER> 49
- MOVE : spec.1 <ENTER> 49
- MOVE : 5 <ENTER> 49
- LIFT : work <ENTER> 50
- LIFT : 150 mm <ENTER> 50
- 3.5 Methods and Sequences 52
- 3.5.3 Process Control 54
- 3.5.4 POWERUP Method 55
- 3.6 User Methods 56
- 4 Detailed Description 62
- 4.2 The Keyboard 63
- 44.2.2.2 .2 Data Entry 81
- 44.2.2.3 .3 Text Entry 82
- <HOME> 84
- 4.3.1 Configuration 85
- >auxiliaries 86
- 4.3.2 Parameters 90
- >manual stop 95
- >start sequence 97
- 1 SAMPLE: = 1 97
- =,+,– 1…999 97
- >sample sequence 104
- 11 WAIT 1 s 104
- 0…1…9999 s 104
- 12 ENDSEQ 104
- 4.5 Sample Racks 107
- 700 Dosino 112
- 4.7.1 Setting up the System 117
- 4.9.3 TriggersTriggers 130
- 4.9.5 Error Messages, Errors 131
- ∗ SAMPLE, STIR, DEF 134
- ∗ CTRL, WAIT, ENDSEQ 134
- Address of stirrer 1…4, ∗ 139
- Address of dosing unit 1…12 139
- Interface selection Rm, RS 140
- ∗, 14 Bit (1,0, or ∗) 144
- ∗ / ENDSEQ> 150
- ∗∗∗∗∗∗∗∗') 152
- 1...4, ∗ 154
- 1.1, 1.2, 1.∗, 2.1, 2.2, 2.∗ 154
- depending on object 156
- 4.11.2 Handshake 158
- Data output 159
- Data input 159
- 4.11.3 Pin Assignment 162
- View of soldered side of plug 163
- 5 AppendixAppendix 164
- 730 Sample Changer, Appendix 165
- 5.2 Technical Specifications 166
- 5.2.2 759 Swing Head 168
- 5.3.1 Servicing 169
- 5.4 Diagnosis 170
- 5.4.3 Working Memory (RAM) 172
- 5.4.4 Display 172
- 55.4.4.5 .5 Keyboard 173
- 5.4.6 Remote Interface 174
- 5.4.8 External Bus Interface 175
- 55.4.4.9 .9 Beeper 176
- 5.5 Initialize data memory 178
- 55.6 .6 Validation / GLP 180
- 5.7.1 Warranty 181
- EU Declaration of Conformity 183
- 759 Swing Head 184
- 5.8 AccessoriesAccessories 186
- Connecting Cables 190
- Sample racks and beakers 190
- Electrodes for Sample Changer 191
- Dosing Instruments 191
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