P 190
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READY/RTS (output): in parallel configuration the high level indicates that the printer is ready to receive
data. The low level indicates that it is on standby (bus Y). In serial communication, if the CTS/RTS protocol
is enabled the high logic state (1) indicates that the printer is ready to receive data; the low logic state (0)
indicates that the print buffer is full and cannot receive data. If the serial protocol XON/OFF is enabled, the
signal is always high.
FEED (input and output): paper feed key, active at low level. This signal is in parallel with the contacts
of FEED key on the front panel of the printer.
STB/RD (input): in parallel configuration a low level tells the printer that there is valid data on the data
bus (D0, ..., D7). In serial configuration this corresponds to the data reception pin.
TP (input and output): PRINT key, active at low level. This signal is in parallel with the contacts of the
PRINT key on the front panel of the printer.
2.4 CONFIGURATION
With the P 190 printer default parameters may be configured.
The parameters affected by configuration are:
• enabling of Real Time Clock setting;
• printing modes;
• no. of bits in parallel communication;
• enabling of seconds display;
• CRLF mode;
• enabling of printing of block 1;
• character sets;
• enabling of lapsed time meter.
The settings made are saved on the 256-byte EEPROM. As an option, a 2 Kbyte EEPROM (non
volatile memory) (see paragraph 5.1), containing 3 blocks - one of 300 bytes and two of 700 bytes - is
available, in which information of any kind can be stored. For details on memory block management
using control characters, please refer to paragraph 4.3.
The printer can either be configured through the PC or by using the front keys on the printer.
Configuration through PC
This can be done by using an IBM or IBM-compatible computer with a serial output, or else by using a
programme which can be supplied on request.
This programme, with its pull-down menus is user-friendly and prompts the operator at each stage of
the input procedure.
Configuration using PRINT and FEED keys
INSTALLATION and USE
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