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Redpost RPC-80 Скачать руководство пользователя страница 18

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Request to Send (RTS) is an output from the RPC-80 that must control the
transmitter in the external computer. The signal usually goes to the CTS input of the
external computer. When RTS is

on

the RPC-80 is ready and able to receive data

and the external computer can transmit, when RTS is

off

the external computer must

wait and not transmit.

During Hard Handshake the characters used for Soft Handshake control should not
be used. If they are received by the RPC-80 they will be treated as normal data
characters which may produce errors.

Soft Handshake

In the Soft Handshake system the handshaking is managed without extra signal
connections by sending handshake characters mixed in with the data characters.
These handshake characters are known as "XOn" and "XOff".

When either party is unable to receive it sends the XOff character to the other party.
When either party receives the XOff character that party must stop transmitting and
wait.

When either party is again ready to receive it sends the XOn character to the other
party. When either party receives the XOn character that party can re-start
transmitting.

At the start of communications it is assumed that both parties are ready to receive
until they signal otherwise. In practice the RPC-80 sends XOn after you switch it on
to indicate it is ready.

The XOn character is fixed as ASCII DC1 / Hex 11 / Decimal 17
The XOff character is fixed as ASCII DC3 / Hex 13 / Decimal 19

During Soft Handshake the signals used for Hard Handshake should not be used.
On the RPC-80 the RTS output is always

on

and the CTS input is ignored. No

connection need be made to either signal.

Serial input buffer

The serial data received by the RPC-80 first enters a buffer. In both handshaking
systems the "Not Ready" signal or character is sent by the RPC-80 when the buffer
becomes 75% full. When the RPC-80 has used enough data from the buffer so that it
is only 50% full then the "Ready" signal or character is sent. In this way there is
some tolerance for data to continue to arrive after the "Not Ready" signal has been
sent and after the "Ready" signal has been sent there will be capacity for a
reasonable amount of continuous reception. The size of the buffer is fixed at a total
of 255 data characters.

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Содержание RPC-80

Страница 1: ...RPC 80 Playback unit Manual 2 Configuration ...

Страница 2: ...NERAL OPERATION 4 THE MAIN MENU 6 GENERAL FORMAT SETUP 6 PU CALCULATION SETUP 9 MONITOR SETUP 11 RPC 80 SETUP 13 FULL LIST SETUP 15 PRINTER SETUP 16 EXTERNAL LINK SETUP 17 DIALOG LANGUAGE 19 DATA TRANSFER TO PERSONAL COMPUTER 19 FIRMWARE UPDATE 19 FINISHED SETUP EXIT 20 ...

Страница 3: ...on allows you to control and adjust some features such as the clock without entering the configuration section This section is described in Manual 1 ENTERING CONFIGURATION SECTION The configuration section is protected by a simple password system that is designed more to prevent inadvertent operation than to deny access to a determined person To enter the configuration section first enter the sett...

Страница 4: ...s and you can move forward and backward through the list using the buttons This is called a menu The centre and right hand buttons are both labelled MORE i e more options available but with right and left pointing arrows to show the direction of movement through the list If you hold either of these buttons down it will repeat its action so that you can step through the list quite fast When you are...

Страница 5: ...r square brackets to show you where the name will appear and how long it can be If you opt to change the name a flashing cursor appears under the first character of the name and the centre and right hand buttons are labelled minus and plus The minus button moves backward through the alphabet while the plus button moves forward If you hold down either of these buttons it will repeat its action The ...

Страница 6: ...rnal Link SET GRAPH FORMATS leads you into the settings for all the graph variables and introduces the idea of user formats User formats The RPC 80 is supplied with all the format details pre set to standard values and you do not need to change any item that you are happy with or that does not apply to your installation Just press the OK button when you are shown an item and it will remain as it i...

Страница 7: ...use a pressure sensor inside the instrument that connects to the container via a quick release coupling and a fine flexible tube This inevitably causes a slight increase in volume which slightly disturbs the pressure in the container If the theoretical volume of the head space of the container is known and entered into the RPC 80 then the unit can make a first order correction for the error The pr...

Страница 8: ...re ignored The names you set apply to all PU monitors you cannot set different names for individual monitors Note Channel 3s name is always used for the pressure channel The older 100 Series RPT 122 pressure monitor has only two channels The pressure channel is channel 2 and will use trace No 2 on the graph but will use the name you set here for channel 3 After you have set up the graph format for...

Страница 9: ...the brewing industry Experiments have shown that Pasteurisation Units are additive in their effect in situations where the temperature is changing such as in the tunnel pasteurisation process If you select STANDARD PU CALCULATION then the Base Value will be set to 60ºC and the Z Value to 7ºC If the temperature units have been set to Fahrenheit then the Base value will be set to 140 ºF and the Z Va...

Страница 10: ...or the 100 300 Series monitors that their own internal settings for PU calculation and Cut off will be over ridden You may therefore get different results when you print out the 100 Series monitor on the older RPC 42 printer charger or display the results on the monitor s own display The advantage of having all the control in the RPC 80 playback unit is that it is very easy to maintain a common st...

Страница 11: ...he possible channels have been set the display changes again to the one with two buttons labelled OK and CHANGE This gives you a chance to change your mind if you have made a mistake If everything is correct press OK Monitors are despatched with all channels active You can make the temperature channels of a PU monitor inactive on a temporary basis by using dummy plugs You might wish to use this pa...

Страница 12: ... At first the SET MONITOR ID display alternates with the serial number of the monitor Press the OK button to start Set up the ID as required The ID can have up to 15 characters letters or numbers and you can change it at any time The ID can also be left blank if you do not require it The active channels you select and the instrument ID that you choose are printed on the Status Report for the monit...

Страница 13: ...e checked even if they have been set inactive For monitors with several temperature channels the check is performed on all at the same time with pass or fail shown for each channel In this case a fixed 60ºC test plug is required for all but the first channel The pass and fail criteria are based on the original specification of the monitor If the monitor fails the cal check it can still be used if ...

Страница 14: ...ery date setting section from accidental use Obviously it is important not to change the battery fitting date unless you have actually fitted a new battery If you answer NO to FINISHED RPC 80 SETUP the display will change to RPC 80 BATTERY CHANGE with YES and NO buttons This display alternates with one showing today s date Press YES only if you have just fitted a new battery If the date is incorre...

Страница 15: ...tting ALWAYS PRINT FULL LIST The list is always printed without any intervention by the operator If the list would take up more than 4 pages the operator is offered the chance to abandon printing before it starts This setting could be used when special tests are being run while setting up a pasteuriser or if particular problems are being encountered but it is not recommended for normal use ALWAYS ...

Страница 16: ...eady for that printer All printers are used for black printing only even if they are capable of printing in colour With certain types of ink jet printer you may need to install both colour and black ink cartridges even for black only printing See the printer s manual Paper Size The SELECT PAPER SIZE menu offers a choice of UK USA and European paper sizes by name and dimensions The RPC 80 is despat...

Страница 17: ...232 Data Terminal Equipment DTE format The connections are Pin Signal Name in out notes 1 Chassis ground 2 Transmit Data TXD out 3 Receive Data RXD in 4 Request to Send RTS out hard handshake 5 Clear to Send CTS in hard handshake 7 Signal ground 14 test signal out fixed Off 9 volts 20 Terminal Ready DTR out fixed On 9 volts Serial handshaking When serial communications take place between two parti...

Страница 18: ...to the other party When either party receives the XOn character that party can re start transmitting At the start of communications it is assumed that both parties are ready to receive until they signal otherwise In practice the RPC 80 sends XOn after you switch it on to indicate it is ready The XOn character is fixed as ASCII DC1 Hex 11 Decimal 17 The XOff character is fixed as ASCII DC3 Hex 13 D...

Страница 19: ...OG only if you wish to connect an external computer via the external link and write special control software is there any need to consider it The DIALOG manual is available on request DATA TRANSFER TO PERSONAL COMPUTER The optional Redlink software allows you to easily transfer results from the RPC 80 to any compatible personal computer that has a serial port The software is supplied with an inter...

Страница 20: ...onfiguration section The RPC 80 playback unit will return to normal operation All the settings you have made will apply to the next print out that you make and will remain in force until you change them All the settings are remembered when mains power is removed from the RPC 80 ...

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