TELEDYNE HASTINGS INSTRUMENTS INSTRUCTION MANUAL THCD-100 CONFIGURABLE DISPLAY ISO 9001 C E R T I F I E D
Manual Print History The print history shown below lists the printing dates of all revisions and addenda created for this manual. The revision level increases alphabetically as the manual undergoes subsequent updates. Addenda, which are released between revisions, contain important change information that the user should incorporate immediately into the manual. Addenda are numbered sequentially.
Table of Contents 1. GENERAL INFORMATION............................................................................................................................................ 4 1.1. 1.2. 2. INSTALLATION AND INTERCONNECTIONS........................................................................................................... 5 2.1. 2.2. 2.3. 2.4. 2.5. 2.6. 3. INTRODUCTION ..........................................................................................................................
1. GENERAL INFORMATION The THCD-100 is a multi featured process display controller, capable of interfacing directly to a mass flow meter, mass flow controller or another process transducer such as the THPS-760S Vacuum Transducer. The THCD-100 is a single channel unit which can be used to power a bipolar (±15dc @ 250mA) device and/or display the output from a transducer that supplies voltage signals up to 10 VDC.
2. Installation and Interconnections 2.1. Installation The THCD-100 can be panel mounted, or used on a bench top and is a standard 96 x 48mm panel meter enclosure. Note that the instrument must always be situated in such a way as to enable adequate air circulation about the unit. If a transducer was supplied with the THCD-100 a suitable cable may have been included. See Section 2.6 for a cut out detail for panel mounting. 2.2.
2.3. Interface Socket Pin out – Miniature 15 Pin 'D' Type Pin Number Designation 1 Analog Output 2 Relay 2 Common 3 Relay 2 Normally Open contact 4 Relay 2 Normally Closed contact 5 0V (Signal Ground) 6 External Setpoint Return 7 N/C 8 External Setpoint 9 N/C 10 0V (Signal Ground) 11 TTL Input – Disable Menu 12 TTL Input – Disable Zero 13 Relay 1 Common 14 Relay 1 Normally Open contact 15 Relay 1 Normally Closed contact 2.4.
2.5. Power Connection Socket The THCD-100 requires a 24V, 500mA supply to operate. This must be a rectified and regulated direct current supply, capable of 15W (recommended). Although the THCD-100 has an internal fuse and power supply overload shutdown protection the supply to the THCD-100 should be protected by fuse or other suitable electronic method. A standard 5.5mm diameter ‘dc power jack’ is required to connect to the THCD-100. Connect the positive conductor to the center pin.
3. FEATURES 3.1. Introduction This section describes the principles used in the THCD-100. It details the various settings for the inputs and the outputs including setpoint control. It does not detail any servicing or calibration procedures. 3.2. Analog Inputs The THCD-100 has two analog voltage input channels. The main input can be configured to accept any input voltage from 0V to a full scale of up to 10V.
(assuming setpoint is in AUTO mode and not a slave source), then the output voltage of the setpoint would be 0.5V. The setpoint does have some configuration parameters that can be used to alter the function of the setpoint control and they are detailed as follows: a) Setpoint Mode The setpoint can be configured in one of three modes – AUTO, OPEN and CLOSED. • In AUTO mode the setpoint output is dependant on the setpoint source and value settings (see below).
b) Filter Size The size of the filter is currently configurable between 0 and 6 seconds and simply indicates the amount of readings that are taken and buffered to calculate and show the averaged reading. A filter size of 0 will naturally turn off the filtering, irrespective of the band setting.
4. Front Panel Operation 4.1. Introduction The front panel consists of a 112x16 dot matrix VFD display with 6 membrane key switches below it. Each switch has legends on and above or below it to indicate its function under different conditions, although there are certain common functions to each screen, as detailed below. For the purpose of the following subsections, the switches shall be referred to using the legends on the buttons. 4.2.
4.3. Front Panel Screens Here follows a complete breakdown of all THCD-100 screens: a) Main Screen (not changing setpoint) The main screen comes in two forms. The first shows the main channel input data (with range, fullscale and calibration applied) and the associated units string. If an input is over range (more than 15% above full scale voltage) then the data value is replaced with the over range error – “RANGE!”. This screen also shows the current mode of the setpoint, if not in AUTO (i.e.
c) Main Menu Screen The Main Menu screen provides a path to select screens that are used for the configuration of the THCD-100 – the setpoint (value, mode, source), input (range, full scale, units string), digital communications, display filtering and relays can all be configured from screens selected via the main menu. It is also possible to reset settings to their factory defaults from the Main Menu screen. Only one option is shown at any one time, in the order shown above.
Input Screen This screen allows you to change the input channel range and fullscale voltage (see the Principles section (5.2) for more information on this) and also assign a units label (up to 5, non-scaling characters) for the channel data. The number of decimal places selected on the range field dictates the number of decimal places shown for the input channel data on the Main screen.
f) Comms Menu Screen The Comms Menu screen provides options for setting the serial communication’s baud rate, address and RS232/RS485 protocol. Switch Functions: Func ◄ ► ▲ ▼ Zero Go back to Main Menu screen Go to previous menu selection Go to next menu selection No function No function Go to screen associated with menu selection g) Serial Screen The main configuration item on the serial screen allows you to select the baud rate of the THCD100 for serial communication.
h) Relay Screen This screen allows you to set the trip point for when the relay switches. The relay also contains some hysteresis to stop it ‘chattering’. This is configurable from this screen as well and is represented as a percentage of full scale of the input channel, with limits of 0.0% (i.e. no hysteresis) to 10.0%. If the second relay option is factory fitted then the above fields are duplicated for the second relay and are changed to Trip 1, Hyst 1 & Trip 2, Hyst 2 as appropriate.
5. SERIAL COMMUNICATION 5.1. Introduction The THCD-100 allows full control and feedback via serial communication protocols (RS232 or RS485). Calibration, in fact, all controls available through the front panel, are available as commands sent using serial communications. Serial communications is available using an RS232 or RS485 link between the client (typically a PC) and the THCD. A baud rate must be configured, along with the selection of protocol. Valid baud rates are 9600, 19200 & 57600.
For a command: For a query: **:;↵ !!!↵ **:;↵ ↵ !!!↵ … where: is the address letter is the command/query (query identified by a ‘?’ after the three chars) is the comma separated parameter list, if any is the acceptance indicator. is the data requested if a query was sent. NOTE: The data usually consists of some identification string, in CAPS, followed by a colon (:) and then the actual data.
the data will be taken every 100ms and buffered up, to be sent out every 500ms in blocks of 5 readings. This has proven to be a more robust output method. c. Setpoint Value – ‘spv’ This command is used to set the value of the command setpoint. The command takes one parameter which is the actual value to set. The current value of the setpoint can be retrieved using the query ‘spv?’. Returned data is: SP VALUE: d. Setpoint Mode – ‘spm’ This command sets the mode for the command setpoint.
g. Setpoint Initial Mode – ‘sim’ As with the value, the setpoint mode set using the ‘spm’ command (above) is a volatile setting. Again this command provides a way of setting an initial startup mode for the setpoint on power up of the THCD. It takes one parameter which is a number between 0 & 2, identifying the initial mode, as follows: 0 = AUTO mode 1 = OPEN mode 2 = CLOSED mode The current mode of the setpoint can be retrieved by using the query ‘spm?’.
the new address. All subsequent communications must use the new address. The current communication address can be obtained using the query ‘add?’. The returned data is: ADDR:
5.5. Channel Setup Commands a) Input Channel Units String – ‘uiu’ The input channel has an associated freeform text field that can be used to identify the units being used. This command is used to set this and its only parameter is a max of 5 characters for the units string.situation and it therefore makes no sense to attempt to change the band setting. For more information on this see the Principles section (5.6). To retrieve the current filter band, use the query ‘flb?’. The returned data is: FILTERING BAND: % b. Filter Size – ‘fls’ Use this command to set the size of the adaptive filtering buffer. The one parameter this command takes is the buffer size in seconds, between 0 and 6 seconds (integer values only).
Other Commands a) User Input Re-zero – ‘irz’ To perform a user input re-zero function, use this command. The command needs no parameters. To find the current user re-zero values for all input channels, use the query ‘irz?’. The data returned is as follows: CH REZERO: …where… = the input channel number = the current re-zero value b) Date of Last Factory Calibration – ‘dlc?’ This query is used to retrieve the date of the last factory calibration run.
6. SERVICE & CALIBRATION 6.1. Service There are no user serviceable parts inside the instruments. Should any difficulties be encountered in the use of the THCD-100, it is recommended that you contact Hastings Instruments for advice and instructions. 6.2. Analog Inputs There is no user calibration for the THCD-100. It is recommended that the instrument be returned to Hastings Instruments whenever such service is required.
7. Appendices 7.1.
7.2. Appendix B Setting Table 2 – Factory Defaults Default Value Additional Information Repeat Rate (for output readings) 0 Serial Communications Baud 57600 Serial Communications Protocol 1 Communicationss Address a Input Channel Units String “” Input Channel Range 10.00 Input Channel Full Scale 10.000 Input Channel Display Precision 2 2 decimal places Input Channel User Rezero 0.0 No rezero set Setpoint Value 0.0 Setpoint Slave Value 0.
7.3.
8. WARRANTY 8.1. Warranty Repair Policy Hastings Instruments warrants this product for a period of one year from the date of shipment to be free from defects in material and workmanship. This warranty does not apply to defects or failures resulting from unauthorized modification, misuse or mishandling of the product. This warranty does not apply to batteries or other expendable parts, or to damage caused by leaking batteries or any similar occurrence.
