PPC Communications Software User`s Manual
Contents
1. Communication Software User s Manual NOTES Page iii 2000 DH Instruments Inc Communication Software User s Manual ABOUT THIS MANUAL Manual Conventions CAUTION is used in throughout the manual to identify user warnings and cautions NOTE is used throughout the manual to identify operating and applications advice additional explanations indicates direct function keys e g RANGE lt gt indicates PG7000 screen displays e g lt 1yes gt 2000 DH Instruments Inc Page iv 1 1 Communication Software User s Manual 1 INTRODUCTION OVERVIEW With your PPC you received a software CD with PPC communications software These programs are intended to make it easy for you to get familiar with your PPC using any PC compatible computer There are three programs on the disk 1 2 TERMINAL Will transform your computer into a terminal to work with the PPC It is a useful program when first learning about your PPC and its operation Further information on using the terminal program is given below The TERMINAL EXE program is intended to be used as an interactive communication link between the PPC and a host computer This program handles all the proper protocol to assure communication between the PPC and the host computer with very little operator intervention The source code is also included and can be used as a guide for writing your own application software2. COMMUNICATIONS SOFTWARE User s Manual 2000 DH Instruments Inc Communication Software User s Manual High pressure liquids and gases are potentially hazardous Energy stored in these liquids and gases can be released unexpectedly and with extreme force High pressure systems should be assembled and operated only by personnel who have been instructed in proper safety practices 1998 2000 DH Instruments Inc All rights reserved Information in this document is subject to change without notice No part of this document may be reproduced or transmitted in any form or by any means electronic or mechanical for any purpose without the express written permission of DH Instruments Inc 4765 East Beautiful Lane Phoenix AZ 85044 5318 USA DH Instruments makes sincere efforts to ensure accuracy and quality of its published materials however warranty expressed or implied is provided DH Instruments disclaims any responsibility or liability for any direct or indirect damages resulting from the use of the information in this manual or products described in it Mention of any product does not constitute an endorsement by DH Instruments of that product This manual was originally composed in English and was subsequently translated into other languages The fidelity of the translation cannot be guaranteed In case of conflict between the English version and other language versions the English version predominates DH I
3. elementary program allowing you to send single commands to the and read back its response SAMPLE Sample of a typical PPC initialization and the beginning of an automated sequence This program is listed in the manual GETTING STARTED To initiate the program type TERMINAL at the DOS prompt The host computer can communicate to the PPC through the following ports COM1 COM2 and IEEE 488 interface The first screen will prompt you for the interface you would like to use COM1 or 2 or IEEE can be selected by pressing lt 1 gt lt 2 gt or lt 3 gt respectively For IEEE communications the TERMINAL program assumes that an IEEE interface card PC 488 from CAPITAL EQUIPMENT CORPORATION CEC 617 273 1818 has been installed in the host computer The terminal program will not work with any other IEEE 488 interface card Page 1 2000 DH Instruments Inc DH PPC Communication Software User s Manual After the interface selection has been made the terminal program will search for the If one of the serial interfaces is selected as the communication port the terminal program will search for the PPC at different baud rates from 9 600 to 300 If the IEEE interface is selected the program will first ensure that an IEEE card is installed in the computer then search all available addresses from 1 to 30 attempting to establish communications with the PPC Once the program locates the PPC the remote light on the PPC wil
4. pressure generation mode and hold state will determine how the pressure is generation and maintained Pressing ESC during a pressure generation procedure will abort the function The pressure generation time is monitored and displayed at the bottom of the screen This is the time in seconds required to reach a ready condition Page 3 2000 DH Instruments Inc DH PPC Communication Software User s Manual 1 2 2 3 PRESSURE The pressure array is intended to be used to generate sequence of pressures in specific order The pressures will be generated using with PS or PSH This is determined by the Generation setting To set up an array press A e press MINIMUM PRESSURE is the first pressure that is to be generated It may also be the last pressure to be generated if return to start is set to YES No limit checking is provided on the minimum or the maximum pressure so care must be taken to ensure that these values are in the normal operating range of the PPC e max press MAXIMUM PRESSURE is the highest pressure in the sequence that the PPC is to generate e of inc NUMBER OF INCREMENTS is the number of pressure steps that the PPC will generate between the minimum and the maximum pressure e ret tos RETURN TO START determines if the PPC will return to the minimum pressure after reaching the maximum pressure If this is set to NO then the pressure array will stop executing after the maximum pressure has been r
5. eached If this is set to YES then after the maximum pressure has been reached the pressure array will continue to generate the same pressures but in the opposite direction until the minimum pressure has again been reached e dwell DWELL is the delay in seconds that the PPC will remain at each pressure increment after a ready condition has occurred After a ready indicator is received then this delay will be executed before the next pressure will be generated If a delay of 0 zero is entered then the next pressure generation will not begin until the C key has been pressed This allows you to stay at a pressure for as long as you like and continue when you are ready Once a pressure array has been set up it can be executed by pressing F 1 2 3 REMOTE COMMAND The remote command can be used to send any command to the PPC When using the remote command lt REMOTE COMMAND gt will be displayed in the current pressure window See the PPC1 Operating Manual for a list of the remote commands available Pressing ESC will return you to the pressure monitoring mode 2000 DH Instruments Inc Page 4 Communication Software User s Manual DH 1 2 4 GENERAL The terminal program contains automatic error checking PPC will return an error whenever it receives an invalid command The terminal program monitors all incoming responses from the PPC and when an error is received will request the cause of the error The return
6. ed error response is then displayed at the bottom of the screen The keyboard input is not interrupt driven and may seem to lag behind a key press at certain times This is normal due to the structure of the program All function and key presses are picked up in a simple run time loop To return to DOS from the terminal program press ESC from the pressure generation mode Page 5 2000 DH Instruments Inc Communication Software User s Manual NOTES 2000 DH Instruments Inc Page 6
7. l come ON and the screen should fill with the returned data The terminal program will now be monitoring the current pressure in the If communication with the PPC is not established check your RS232 cable pin outs If your PPC has an IEEE interface be sure that the interface selector switch on the back of the PPC is set to the proper position 1 2 1 OPERATION The top part of the screen contains the most common parameters used for pressure generation See Figure 1 These parameters can be easily changed by pressing the appropriate highlighted key and entering the required data The actual data is the only parameter that has to be entered The terminal program will send out the corresponding command in the proper format When setting any of these parameters a message will be displayed in the current pressure window to indicate what is being changed Table 1 lists these parameters along with the related KEY PRESS and the actual command that it corresponds to PPC COMMUNICATIONS TERMINAL Version 3 00 Copyright DH INSTRUMENTS April 1995 Range 6000 psi Interface Device Hold 25 000 0 050 Stability Vacuum No 6000 000 Units Target Pressure 0 000 pressure Array current pressure R 1 560 psi min pres max pres Generation Mode Static Hold Off of Inc Ret to a dwell Remote command reply Execute Continue status Idle baud 2400 lt ESC gt to EXIT Figure 1 PPC Communication Te
8. nstruments DH and DHI are trademarks registered and otherwise of DH Instruments Inc Document No 550056a 01 000815 Printed in the USA 2000 DH Instruments Inc Communication Software User s Manual TABLE OF CONTENTS TABLE OF CONTENTS SES Sn SR SA de saan dat s ii FIGURES destin ren sms nee ii ABOUT THIS MANUAL dau dun andere iv INTRODUCTION de ete ess 1 1 1 9 7 4 TA 1 1 2 GETTING STARTED 1 1 21 OPERATION nn ne 2 1 22 PRESSURE GENERATION 3 1220 GENERATION MODE uns nt te 3 1222 TARGET PRESSURE A 3 1229 PRESSURE ARRAY 4 1 23 REMOTE COMMANDE 4 1 24 GENERAD ican iiaei aiteas ai aaria EEan a aAA eerta e ri E AAA 5 Page i 2000 DH Instruments Inc Communication Software User s Manual TABLES Table 1 Key Press Command List 3 FIGURES Figure 1 Communication Terminal Screen ii 2 2000 DH Instruments Inc Page ii
9. rminal Screen 2000 DH Instruments Inc Page 2 Communication Software User s Manual DH Table 1 Key Press Command List RELATED COMMAND DEVICE TARGET STABILITY 0 py RANGE 1 RANGE 0 the DEVICE is changed then the other parameters are also updated TERMINAL program uses the standard PPC remote commands For further information on specific commands please refer to the proper PPC operating manual The middle part of the screen is used for pressure monitoring and pressure generation 1 2 2 PRESSURE GENERATION 1 2 2 1 GENERATION MODE The GENERATION MODE can be set by simply pressing G A menu will be displayed giving you the option to select either lt Static gt or lt Dynamic gt If the static mode is selected another option will be displayed to determine whether the pressure hold is ON or OFF lt Hold ON gt refers to setting the pressure with the PS command which just sets the pressure lt Hold OFF gt refers to setting the pressure with the PSH command which sets and holds the pressure In dynamic mode the target limit is automatically set to zero and the pressure hold is always ON so no selection is necessary 1 2 2 2 TARGET PRESSURE The TARGET PRESSURE can be set by pressing P When a new value is entered that value becomes the target pressure and a pressure generation to the next target value will take place The current
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