Process Unit 73 LF - Knick

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Process Unit 73 LF Transmission behavior For fault-free data exchange between the connected computer and the Process Unit 73 LF, the parameter settings of both devices must match (also see Pg. 9–51). Read/Write Read commands: Read commands (queries) always supply an answer. Write commands: For write commands the answer is dependent on the parameter setting. The “WPMSR1” command switches on the check-back signal following write commands. The check-back signal is output as an empty string (message terminators only). The check-back signal acknowledges the complete processing of the received command. The receiving buffer is released again. The check-back signal does not mean that the command has been transmitted fault-free! With the check-back signal switched off, it is necessary to wait until the processing time of the Process Unit 73 LF runs out. This may vary greatly. To avoid transmission errors, the waiting time should be at least one second. Parameter setting strings The characters of the standard ASCII character set (numbers 0 – 9, lower-case and upper-case letters, special characters such as +, – ...) are used. Spaces (blanks) in the parameter setting string are read over. Therefore, they can be used as often as desired for formatting. No spaces may be used in numerical parameters. Answers of the Process Unit 73 LF contain only upper-case letters. Each parameter setting string must be ended with a message terminator. A (carriage return), (line feed) or a combination of the two can be transmitted. The Process Unit 73 LF does not begin processing the received command until the message terminator is received. Without message terminators the receiving buffer fills up. When the receiving buffer is full, the error message “Warn RS 485 Overflow” appears. 12–4 Interface Commands
Numerical parameters Numerical parameters can be entered as desired with or without an exponent. Additional places to the right of the decimal point are ignored. Parameters can only be transmitted in their basic units, e.g., “124 mV” is represented as “124E–3” in volts. The Process Unit 73 LF always selects the shortest possible display form, i.e., “50.00 mS/cm” is transmitted as “50”. VALUE Commands: Query measured values With the value commands, all measured values of the Process Unit 73 LF can be queried. Value commands are read commands. As a result, the device status of the Process Unit 73 LF is not changed. Command RV2 RV3 Meaning Query measured C value Query measured conductivity RV4 Query concentration (only with option 359, 360, 382) RV5 Query input current RVI1 Query output current 1 RVI2 Query output current 2 (only with option 350) RVR3 RVTRT RVDRT Query resistivity Query time ”hhmmss” Query date “ddmmyy” (sequence depending on setting) RVYCI Query digital controller output (only with option 353) RVYCN Query analog controller output (only with option 483) Interface Commands 12–5
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Instruction Manual Process Unit 73
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Changes for Software Release 6 Proc
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Safety Information Be sure to read
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Information on Electromagnetic Comp
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The representation of a menu in thi
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Contents Safety Information . . . .
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9 Capabilities of the Process Unit
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1 Overview of the Process Unit 73 L
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vanic isolation optional) allows li
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2 Operating the Process Unit 73 LF
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Control Elements Pressing menu key
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How to select a menu item Press scr
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How to keep the old setting Pressin
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3 Diagnostics Menu What you can do
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How to enter the point of measureme
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Device Diagnostics What you can do
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4 Maintenance Menu What you can do
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Resistance Measurement Press and
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Temperature Probe Adjustment This f
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5 Viewing Level What you can do on
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6 Calibration Why do you have to ca
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How to select a calibration sequenc
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Automatic Calibration with Standard
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Calibration by Manual Entry of Cond
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Calibration by Entry of Premeasured
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With TC correction T ref = 25 °C W
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7 Operator Level What you can do on
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8 Administrator Level Before commis
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An Example You want to change the s
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How to set the administrator passco
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9 Capabilities of the Process Unit
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Pt 100/ Pt 1000/ Ni 100 Process Uni
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wt pk bn gy bu gn rd yw Shi
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Conductivity Measurement using ZU 0
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Sensor cable Terminal box ZU 0307 E
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Sensor cable Terminal box ZU 0307 g
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Calibration Solution for Automatic
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Manual Temperature Compensation Man
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How to define temperature compensat
Page 79 and 80: Trilinear Output Curve output curre
Page 81 and 82: 2nd Current Output If your unit is
Page 83 and 84: 100 Trilinear (Bilinear) Curve (fal
Page 85 and 86: How to set the parameters for conce
Page 87 and 88: Complete Installation using all Fun
Page 89 and 90: NAMUR Contacts The three NAMUR cont
Page 91 and 92: During calibration the limit contac
Page 93 and 94: In measuring mode the present value
Page 95 and 96: Output 2 can be used to control val
Page 97 and 98: The information text shows the cont
Page 99 and 100: ÍÍÍÍÍÍÍÍÍÍÍÍ ÍÍÍÍÍ
Page 101 and 102: Error Messages for Controller Setti
Page 103 and 104: How to set the current input parame
Page 105 and 106: Cleaning: The contact ”cleaning
Page 107 and 108: How to set the rinsing cycle parame
Page 109 and 110: Remote Interface Operation You can
Page 111 and 112: How to set the interface parameters
Page 113 and 114: 10 Information on Mounting and Inst
Page 115 and 116: front removable for instrument inst
Page 117 and 118: Installation Installation of the Pr
Page 119: Maintenance and Cleaning The Proces
Page 122 and 123: Process Unit 73 LF Error Message (D
Page 124 and 125: Process Unit 73 LF According to Int
Page 126 and 127: Process Unit 73 LF 11-6 Error Messa
Page 128 and 129: Process Unit 73 LF Output Current 1
Page 132 and 133: Process Unit 73 LF STATUS Commands:
Page 134 and 135: Process Unit 73 LF Device Diagnosti
Page 136 and 137: Process Unit 73 LF Clock RPRTM WPRT
Page 138 and 139: Process Unit 73 LF WPDISLAI1 Displa
Page 140 and 141: Process Unit 73 LF RPTOMA WPTOMA0 W
Page 142 and 143: Process Unit 73 LF Output Current 1
Page 144 and 145: Process Unit 73 LF Output 2/Control
Page 146 and 147: Process Unit 73 LF Limit Contacts/C
Page 148 and 149: Process Unit 73 LF RPCIBV WPCIBVp R
Page 150 and 151: Process Unit 73 LF Current Input RP
Page 152 and 153: Process Unit 73 LF Automatic Device
Page 154 and 155: Process Unit 73 LF Digital Controll
Page 156 and 157: Process Unit 73 LF Interface Bus Pr
Page 158 and 159: Process Unit 73 LF 4th Field: CRC16
Page 160 and 161: Process Unit 73 LF Interface Bus Pr
Page 162 and 163: Process Unit 73 LF Mounting Accesso
Page 164 and 165: Process Unit 73 LF Display Display
Page 166 and 167: Process Unit 73 LF Cells Model SE 6
Page 168 and 169: Process Unit 73 LF Model ZU 0071*)
Page 170 and 171: Process Unit 73 LF cable length app
Page 172 and 173: Process Unit 73 LF 1 Observe instal
Page 174 and 175: Process Unit 73 LF connector plug W
Page 176 and 177: Process Unit 73 LF [mS/cm] 1,200 H
Page 178 and 179: Process Unit 73 LF 700 [mS/cm] Sal
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Process Unit 73 LF Sodium Chloride
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Process Unit 73 LF EPROM Replacemen
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Process Unit 73 LF 16-4 Appendix
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Process Unit 73 LF conductance cond
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Process Unit 73 LF Parameter Settin
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Process Unit 73 LF cell, SE 603 app
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Process Unit 73 LF limit contacts/c
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Process Unit 73 LF viewing angle ad
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Process Unit 73 LF - Knick

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