Synergy PF-550 User manual

Fiscal Printer SYNERGY PF-550
Fiscal Printer
PF-550
USER’S MANUAL
INTRODUCTION
SYNERGY PF-550 is a compact thermal printer with fiscal memory, which prints cash receipts and daily reports
on two separate paper rolls 58 mm wide. It is compatible to most European and World fiscal legislation systems.
The functions of the device are controlled with the help of buttons, located on its frontal part as well as commands,
sent via the serial interface. The couplings for the cable connections are conveniently located for fast access and easy
manipulations. The printing devices have low noise emission levels and high printing speeds - 50 mm/sec.
The printer has an automatic paper cutter. Optionally, it can support a display and a cash drawer.
Contemporary commercial activities and the demands of acting fiscal legislation systems demand a comparatively
good knowledge on the ways to operate fiscal devices of different kinds - cash registers, electronic scales, different
types of printing devices. It is for this reason, that the careful reading of this manual before starting work with the
printer may save you lots of time and trouble later on.
WORKING WITH THE FP-550 FISCAL PRINTER
The over 50 different commands which the printer can execute may initially create the impression that learning to
work with it is a difficult job. Most of these commands, however, are related to the starting initialization, diagnostics
and the generating of reports thus decreasing greatly the number of commands directly engaged with the issuing of
receipts and other user’s operations.
As an example may serve the commands, which must be sent to the printer to make it generate a fiscal and a non-
fiscal receipt. Only the order numbers of the commands will be presented and the data there related without getting into
the details of the contents of the special symbols which guarantee the viability of the data and ensure the correct
communication between the printer and the personal computer.
TAX CATEGORIES AND CALCULATION OF VAT
The commands for sale are accepting as parameters the big letters А, Б, В, Г (ASCII codes 192, 193, 194, 195).
Neto value is calculated by the formula:
net_amount = ROUND(sale_amount / (1 + tax_rate))
Payed tax is calculated by the formula:
tax_amount = sale_amount - net_amount
Important:
If the user of the fiscal printer is TAX payer (the VAT number is not empty) then TAX categories А, Б and В
are accepted, and Г is refused.
If the user of the fiscal printer is not TAX payer (the VAT number is empty) then TAX category Г is accepted,
and А, Б and В are refused.
DIFFERENCES TO PF500
- If the user of the fiscal printer is TAX payer (the VAT number is not empty) then TAX categories А, Б and
В are accepted, and Г is refused.
- If the user of the fiscal printer is not TAX payer (the VAT number is empty) then TAX category Г is
accepted, and А, Б and В are refused.
- Daily report can be executed only once in a day.

Fiscal Printer SYNERGY PF-550
FISCAL RECEIPT
OPENING A FISCAL RECEIPT
Command: 48 (30h)
Data: “1,000000,12”
The first number is the operator’s number (maximum 16), the second is the operator’s password while the third is
the order number of the point of sale (department or location). In a newly purchased printer the six zeros are the
operator’s default password – you may, naturally, enter your own. The third number is suitable only in commercial
centers with many points of sale (departments). After entering this command the printer will print out several “header”
lines which will contain the text registration number and the name and individual number of the operator.
REGISTERING A SALE
Command: 49 (31h)
Data: “2 x 120 <TAB>B2.40”
A text of 25 symbols is printed /prior to the symbol there is a tab symbol - 09h/, the price of the item and its
relevant tax group, which is in the 40th position on the line. The commentary may be of only two lines, in which case
the lines will be divided with an <LF> (0Ah).
PAYMENT
Command: 53 (35h)
Data:”<TAB>P2.50”
The command is used for receiving the payment on the registered sales, after which new sales are forbidden. Before
the tab symbol the spacing might also have a descriptive text of one or two lines, which have not been presented in the
example. Symbol ‘P’ shows the type of payment employed - in this particular case “in cash” - after which the sum due
is printed out. The payment can be performed several times but the closing of the receipt is possible only if the overall,
paid sum is equal or greater than the sum of the sales.
CLOSING A FISCAL RECEIPT
Command: 56 (38h)
Data: “”
The command print a maximum of two lines of text - usually an advertisement “footer”- the reg. number of the
document, the quantity of the sales registered and the compulsory elements of any fiscal receipt: fiscal logo, date and
hour, serial number of the printer and the reg. number of the fiscal memory. After sending the command the paper is
cut, if automatic cutting is enabled. The printer is ready for a new document.
PROGRAM SUPPORT
To function normally the program for operating the fiscal printer must be able to control the execution of the
commands, which often fail mainly due to the lack of paper, the sending of invalid commands or simply because of
some minor cable problem. The current status of the printer is monitored by 6 bytes, returned by every command. Part
of the bits are informative /opened non-fiscal receipt for instance/, others indicate error /no paper, invalid command,
etc./. The program must inform of existing errors or - if possible - react to these errors.
There are commands with the help of which the control program can acquire the whole needed information on the
current status of the printer. The printer saves this info in the memory as well as the accumulated sums (during the day
or only within the current receipt) even after it has been switched of from the power feed. If the device is in the
“document opened” mode it cannot close down automatically but only from the control program.
GENERAL DESCRIPTION OF THE PF-550
The functional control of the printer is performed with the help of buttons, located on its frontal part and
commands, sent via the serial interface. The coupling of the cable connections are located in such a way as to make
them easily connectable and the whole device fast to set up for normal operation.
Prior to using this device please read these instructions and the descriptions of the application programs carefully
and make sure that you have really learned how to operate the PF-550 .

Fiscal Printer SYNERGY PF-550
CONTROL PANEL INDICATORS AND BUTTONS
“Power” indicator
Lights in green when the printer is on and does not execute commands. When the light is out this is an indication
that the printer is “engaged” with a command.
“Error” indicator
Activated continuously when there is no paper in the device and blinks at the overheating of one/both printing
devices. Goes out when the error is cleared.
“Cash receipts” button
Moves the cash receipts paper roll forward. When the button is kept pressed down while power on, the printer
generates and prints out diagnostic information on both paper rolls.
“Journal paper roll” button
Moves forward the electronic journal paper roll. When pressed down while power on prints out the daily report
without clear (X-report). This can be also generated through a separate command.
When both buttons are pressed down while power on, the printer generates a short periodic report for the whole
period of exploitation if (and when) the printer is a fiscal device. The job will also be done through a special command.
INTRODUCTION
The fiscal device operates under the control of an application program, with which it communicates via the RS232
serial connection. The device executes a previously set of wrapped commands, arranged according to the type of the
operations which have to be executed. The application program does not have a direct access to the resources of the
fiscal device although it can detect data connected with the status of the fiscal device and the fiscal memory.
The fiscal device performs the following types of operations:
 Saves the serial number of the fiscal device and the number of the fiscal memory;
 Saves fiscal parameters, like the tax registration number, the date of entering into exploitation, etc.;
 Saves information on the owner - name and address, etc.;
 Saves the daily turnover in the fiscal memory and generates a daily report;
 Generating reports on concluded sales and the content of the fiscal memory;
 Dispatching data to the application program.
TAXATION CATEGORIES AND CALCULATION OF VAT
Each concluded sale can be related to a certain taxation category (VAT) defining a tax rate, applicable to the base
price used for the formation of the sale price. The fiscal printer can operate with a maximum of 4 taxation categories,
which are most often indicated with the first letters of the language of the country, where the fiscal printer is used-in the
case of England these letters are A, B, C, D.
Each of the taxation groups has a set tax rate (in percent) which is expressed by a number not greater than 99.00
and by no more than two digits after the decimal point.
Part of the four standard categories may be forbidden by using Rates_fewer in the 83(53H) command. The
commands for registering sales read the said four letters as a parameter.
FUNCTION MODES OF THE FISCAL DEVICE
The fiscal device has two functional modes:
1. The tutorial mode. The device is not fiscalized and all data needed for its normal functioning are
entered and saved in the fiscal memory with the exception of the tax registration number of the owner. Fiscal
receipts can be opened and closed but they always bear the inscription that they are not fiscal. Daily financial
reports with clearing can be generated but they are not saved in the fiscal memory.
2. Normal mode. The device has been fiscalized and the tax registration number of the owner is saved in
the fiscal memory. Al fiscal rules apply.

Fiscal Printer SYNERGY PF-550
STATUS OF THE FISCAL DEVICE
The status of the fiscal device can differ. Shifting from one to another condition is not always possible. The control
of the printer and the shifting between the different functions - when this is possible - is executed by the application
program Host (PC), which must relate to the included protocol. If this protocol is not applied correctly the printer might
enter into an undesirable status or to skip a given functional status, leading to an ERROR.
A) INITIAL STATUS
This is the functional status in which the date and the hour are set, the number of the fiscal memory is entered as
well as the serial number and the code of the country where the device will be operated.
THE ABOVE-DESCRIBED OPERATIONS ARE PERFORMED PRIOR TO SELLING THE DEVICE TO
THE CLIENT ONLY BY AN AUTHORISED SERVICE SPECIALIST!
The following commands must be performed in the order in which they are presented: 61 (3DH) and 91 (5BH).
B) STATUS AFTER THE FORMATTING OF THE FISCAL MEMORY
This is the state in which the name of the currency is entered, the number of the digits after the decimal point and
the tax rates. After performing these operations the fiscal printer is ready for delivery to the future operator (owner).
This is also the status in which the device is kept in the warehouse of the manufacturer.
The following commands are performed in the order in which they are presented: 83 (53H) and 96 (60H).
C) STATUS WHEN PRESENTING THE DEVICE TO THE CLIENT
In this functional state the header and the footer are set - the beginning and the end of each receipt. The header
contains information on the owner (name of the company, address etc.) while the footer is usually a short advertisement
text.
The command 43 (2BH) is performed as many times as is the number of printed lines.
D) TUTORIAL MODE
The fiscal printer is in this status prior to fiscalization. Receipts can be issued but it must be born in mind that they
will bear the mark “non-fiscal”. The generation of a daily turnover report with clear but it will not be saved into the
fiscal memory. A tax registration number is also entered but not into the fiscal memory and is subject to change. The
clearing of the memory does not cause an entry in the fiscal memory. The clock may be set arbitrarily.
E) A FISCALIZED PRINTER
In this functional status fiscal receipts may be issued and they will be marked “fiscal”. The daily report and clear is
registered in the fiscal memory and the setting of the date is possible only ahead in relation to the last entry in the fiscal
memory. The tax registration number is registered in the FM and cannot be changed from this point on. It is
IMPOSSIBLE for the printer to exit the fiscal mode without changing the fiscal memory.
The tax registration number of the owner of the device must be known prior to fiscalization. Command 98 (62H)
after which the command 72 (48H) must be executed.
F) IRRECOVERABLE ERROR IN THE FISCAL PRINTER
This is the status of the printer when a serious technical or logical mistake has occurred as well as in case of fiscal
memory failure. After switching ON the device in this mode a bold sign “FATAL ERROR: 4” appears. The printer
does not perform commands for opening fiscal receipts as well as documents, which save data entries into the fiscal
memory. Only diagnostic commands and periodic reports can be executed. Clearing the RAM and placing a new fiscal
memory module must be performed because the module used before the error is now switched to the READ ONLY
mode. ALL THESE OPERATIONS MUST BE PERFORMED BY AN AUTHORIZED SERVICE SPECIALIST.
The events, which can bring the printer to this state, are:
- Impossibility to make a correct entry in the fiscal memory;
- Invalid control sum, tax number, serial number, reg. No. of the fiscal memory or some of the entries which
contain the tax rates.
- Unidentified format of the fiscal memory module;
- If during the fiscal memory check up (immediately after switch ON) more than three invalid control sums
from a daily report fiscal entry are found.
The current status of the device is coded in a field 6 bytes long which is sent within each message of the fiscal
printer. Description of each byte in this field:

Fiscal Printer SYNERGY PF-550
Byte 0: General purpose
0.7 Reserved
0.6 Reserved
0.5 General error - OR of all errors marked with ‘#’
0.4 Failure in printing mechanism
0.3 Not used
0.2 The clock needs setting
0.1 # Code of incoming command is invalid
0.0 # Incoming data has syntax error
Byte 1: General purpose
1.7 Reserved
1.6 Reserved
1.5 Printer cover is opened
1.4 # RAM failure after switch ON
1.3 Not used
1.2 # Operational memory was cleared
1.1 # If command cannot be performed in the current fiscal mode
1.0 If during command some of the fields for the sums overflow. Status 1.1 will also be set and the
command will not cause changes to the data in the printer.
Byte 2: General purpose
2.7 Reserved
2.6 Reserved
2.5 If a non-fiscal receipt has been opened
2.4 Not enough journal paper
2.3 A fiscal receipt has been opened
2.2 Journal paper end
2.1 Not enough paper - both journal and receipt paper rolls.
2.0 # No paper - valid for both paper rolls. If the flag is raised during a print-related command it will be
rejected and the status of the printer will remain unchanged.
Byte 3: The status of the configuration keys
3.7 Reserved
3.6 Reserved
3.5 Not used
3.4 Not used
3.3 SW4 state. Sets the baud rate of the serial port.
3.2 SW3 state. Enables the “transparent display” mode.
3.1 SW2 state. Not used
3.0 SW1 state. Permits the automatic paper cutting function.
Byte 4: The fiscal memory
4.7 Reserved
4.6 Reserved
4.5 OR of all mistakes marked by ‘*’ from bytes 4 and 5.
4.4 * Fiscal memory is fully engaged.
4.3 If there is space for not more than 50 entries in the FM.
4.2 If there is no fiscal memory
4.1 Not used
4.0 * When there is an error during entry in the fiscal memory
Byte 5: The fiscal memory
5.7 Reserved
5.6 Reserved
5.5 If the serial number and the number of the fiscal memory are programmed in advance
5.4 If tax rates have been entered at least once
5.3 If the printer is in the fiscal mode
5.2 Not used
5.1 If the fiscal memory has been formatted
5.0 * If the fiscal memory is in the “read-only” mode

Fiscal Printer SYNERGY PF-550
POWER SUPPLY CUT-OFF
The status of the printer at each particular moment is reflected in the so-called “status bytes”. The application
program must get information on the status of the printer when switched ON after a power cut-off. This is performed
by the commands 76 (4AH) and 103 (67H).
The application program must make a decision on the future behavior of the printer depending on its current status.
It is guaranteed that the fiscal memory will not be affected by the power failure as well as that all accumulated sums in
the operational memory of the device will be valid. If the power cut-off has occurred during a printing session, when
switched ON, again the printer will print a line containing the text “* POWER DROP *” in an expanded bold type and
will then complete the print.
If power has failed during the printing of a daily report, after switch ON, the device will print the message “PRINT
REPEAT” in an expanded bold type and will restart the execution of the command (i.e., printing will be resumed).
ISSUING FISCAL RECEIPTS
A fiscal receipt is first opened, the sales are registered, payment is performed and the receipt is finally closed.
The following commands are used: 48 (30H), 49 (31H), 51 (33H), 52 (34H), 53 (35H), 54 (36H) and 56 (38H). At
the end of the day a daily financial report and clear are performed in order to enter and save the accumulated
information in the fiscal memory. The function is started with the command 69 (45H).
GENERATING REPORTS
Reports are generated singularly by the fiscal printer upon receiving the respective command from the PC. In these
reports the user’s program will not add any changes to the appearance and content of the reports, i.e., they appear
exactly as they have been defined in the fiscal printer. The following commands are used for the generation of reports:
50 (32H) Report on changes in tax rates and decimal points
69 (45H) Daily financial report with or without clear
79 (4FH) / 95 (5FH) Short financial report from date to date /from number to number of the respective fiscal
entries
LOW LEVEL PROTOCOL
A) PROTOCOL TYPE - MASTER (HOST) / SLAVE
The fiscal printer performs the commands sent by the Host and returns messages, which depend on the result.
The fiscal printer cannot instigate asynchronous communications itself. Only responses to commands from the Host
are sent to the Host. These messages are either wrapped or single byte control codes. The fiscal printer maintains the
communication via the RS232 serial connection at baud rates of 19200 and 9600 b/s, 8N1. The baud rate is set by
adjusting the configuration switch SW4.
B) NON-WRAPPED MESSAGES - TIME-OUT
When the transmitting of messages from the Host is normal, Slave answers not later than 60 ms either with a
wrapped message or with a 1 byte code. Host must have 500 ms of time-out for receiving a message from Slave. If
there is no message during this period of time the Host will transmit the message again with the same sequence number
and the same command. After several unsuccessful attempts Host must indicate that there is either no connection to the
fiscal printer or there is a hardware fault.
Non-wrapped messages consist of one byte and they are:
A) NAK 15H
This code is sent by Slave when an error in the control sum or the form of the received message is found. When
Host receives a NAK it must again send a message with the same sequence number.
B) SYN 16H
This code is sent by Slave upon receiving a command which needs longer processing time. SYN is sent every 60
ms until the wrapped message is not ready for transmitting.
C) WRAPPED MESSAGES
a) Host to printer (Send)
<01><LEN><SEQ><CMD><DATA><05><BCC><03>
b) Printer to Host (Receive)
<01><LEN><SEQ><CMD><DATA><04><STATUS><05><BCC><03>

Fiscal Printer SYNERGY PF-550
Where:
<01> Preamble.
1 byte long. Value: 01H.
<LEN> Number of bytes from <01> preamble (excluded) to <05> (included) plus the fixed offset of 20H.
Length: 1 byte. Value: 20H - 7FH.
<SEQ> Sequence number of the frame.
Length : 1 byte. Value: 20H – FFH.
The fiscal printer saves the same <SEQ> in the return message. If the FP gets a message with the
same <SEQ> as the last message received it will not perform any operation, but will repeat the last
sent message.
<CMD> The code of the command.
Length: 1 byte. Value: 20H - 7FH.
The fiscal printer saves the same <CMD> in the return message. If the printer receives a non-
existing code it returns a wrapped message with zero length in the data field and sets the respective
status bit.
<DATA> Data.
Length: 0-91 bytes for Host to printer, 0-84 bytes for Printer to Host. Value: 20H – FFH.
The format and length of the field for storing data depends on the command. If the command has no
data the length of this field is zero. If there is a syntax error the respective status bit is established in
the data and a wrapped message is returned with zero field length.
<04> Separator (only for printer-to-Host massages)
Length: 1 byte. Value: 04H.
<STATUS> The field with the current status of the fiscal device.
Length: 6 bytes. Value: 80H-FFH.
<05> Postamble
Length: 1 byte. Value:05H.
<BCC> Control sum (0000H-FFFFH)
Length: 4 bytes. Value of each byte: 30H-3FH.
The sum includes between <01> preamble (excluded) to <05>. Each digit from the two bytes is sent
after 30H is added to it. For example the sum 1AE3H is presented as 31H, 3AH, 3EH, 33H.
<03> Terminator
Length: 1 byte. Value: 03H.
MESSAGE COMPOSITION, SYNTAX, AND MEANINGS
a) The data field depends on the command.
b) The parameters sent to the printer may be separated with a comma and/or may have a fixed length.
c) The comma between the parameters shows that it is mandatory.
d) When the parameters are closed by <> they are mandatory although the brackets themselves are not present in
the message. When a given parameter is closed in [ ] it is not mandatory - the bracket themselves are also not present in
the message. When parameters are separated by ‘|’ symbol, only one of them may present in the input data.
The symbols with ADCII codes under 32 (20H) have special meanings and their use is explained whenever
necessary. If such a symbol has to be sent for some reason (for example in an ESCAPE-command to the display) it
must be preceded by 16 (10H) with an added offset 40H.
Example: when we write 2500, 100, Text for the data field then in that field there will be 2D 32 35 30 2C 31 30 30
2C 54 65 78 74 where each hexadecimal digit is an ASCII value.

Fiscal Printer SYNERGY PF-550
LIST OF FISCAL COMMANDS - FUNCTIONAL ARRANGEMENT
This section contains a list of the fiscal printer commands arranged in groups depending on their functions:
INITIALIZATION
3DH (61) Date and hour
65H (101) Entering the operator’s password
66H (102) Entering the name of the operator
6BH (107) Defining of and item’s report
SALES
30H (48) Opening a fiscal receipt
31H (49) Registering a sale
33H (51) Subtotal
34H (52) Registering a sale and showing it on the screen
35H (53) Sum calculation (tender).
38H (56) Closing a fiscal receipt
3AH (58) Registering an item sale
55H (85) Opening a void receipt
56H (86) Closing a void receipt.
DAILY CLOSURE
45H (69) Daily financial report (with or without clear)
REPORTS
32H (50) Report on changed tax rates and decimal points through the period
49H (73) Detailed report of the fiscal memory (from number to number)
5EH (94) Detailed report of the fiscal memory (from date to date)
4FH (79) Short report of the fiscal memory (from number to number)
5FH (95) Short report of the fiscal memory (from date to date)
6FH (111) Items report
INFORMATION TO HOST
3EH (62) Turns back the date and the hour
40H (64) Information on the last fiscal entry
41H (65) Information on daily taxation
43H (67) Information on daily sums
44H (68) Number of free entries in the fiscal memory
4AH (74) Receiving the status bytes
4CH (76) Status of the fiscal transaction
5AH (90) Receiving diagnostic information
61H (97) Receiving the tax rates
63H (99) Tax registration number
67H (103) Information on the current receipt
6EH (110) Receiving information on the sums arranged according to the type of payments
70H (112) Receiving information on the operator
71H (113) Receiving information on the last printed document
72H (114) Receiving information on a fiscal entry for given number (from – to).
73H (115) Receiving information on a fiscal entry for given period (from – to).
PRINTER CONTROL COMMANDS
2CH (44) Advance paper
2DH (45) Cut off.
DISPLAY
21H (33) Clearing the display
23H (35) Showing a text (lower line)
2FH (47) Showing a text (upper line).
3FH (63) Showing the date and the hour.
64H (100) Display - full control.
OTHER

Fiscal Printer SYNERGY PF-550
46H (70) Office cash-in and cash-out
47H (71) Print diagnostic information
6AH (106) Drawer kick-out

Fiscal Printer SYNERGY PF-550
DETAILED DESCRIPTION OF THE COMMANDS
21H (33) CLEARING THE DISPLAY
Data field: No data
Response: None
A clear display command is sent. If a fiscal receipt is opened and SW3 is OFF only the lower line is cleared.
23H (35) TEXT ON THE LOWER LINE OF THE DISPLAY
Data field: <Text>
Response: None
Text A text of up to 20 symbols sent directly to the display. Prior to this a command for positioning
and clearing the lower line is sent.
2CH (44) ADVANCING PAPER
Data field: [Lines[,Option]
Response: None
Lines Advancing paper measured in lines. The programmed line count cannot be greater than 99 (1 or 2
bytes). If the parameter is not there the default setting is 1 line.
Option Defines which paper to be advanced:
“0” No effect
“1” The receipt paper roll is advanced
“2” The journal paper roll is advanced
“3” Both paper rolls are advanced to the set length.
If the second parameter is missing the default setting is to advance only the receipt paper roll.
2DH (45) CUTTING OFF PRINTED DOCUMENTS
Data field: None
Response: Result
Result The result from the execution of the command:
“P” Successful cut off
“F” The automatic cutter has blocked.
The command causes the cutting off of the printed, ready document. It must be considered that the program must
advance the paper with at least two lines or the document will not be cut off correctly. If the printer is in the “automatic
cut off” mode it positions the paper itself and the command becomes redundant.
When the printing mechanism blocks for some reason, the paper roll must be taken out of the cutter mechanism and
the command must be executed again. This will position the blade in the extreme right-end of the mechanism.
2F(47) DISPLAYING A TEXT ON THE UPPER LINE OF THE DISPLAY
Data field: Text
Response: None
Text A text of 20 symbols which is sent directly to the display. Prior to this a command for the
positioning and clearing of the upper line. If a fiscal receipt is opened and SW3 is OFF the
command is rejected.
30H(48) OPENING A FISCAL CLIENT’S RECEIPT
Data field: <OpCode>,<OpPwd>,<TillNmb>
Response: Allreceipt,FiscReceipt
OpCode Operator’s number (1 to 16)
OpPwd Operator’s password (4 to 6 digits)
TillNmb Number of the point of sale (a whole number of maximum 5 digits)
Allreceipt The number of all issued receipts (fiscal or not) from the last daily closure up to the moment (4
bytes).