User Manual

Technical Manual for Master Terminals of the Series IF 152x
Page 2
Master Functions
Depending on the hardware equipment, the master terminal is capable of handling the data traffic of
IF XXX terminals independently. The required data, such as information on booking-authorized card
numbers, day and week programs, keys and display texts, is stored in the RAM. Part of the RAM is
used as a ring booking storage. All the bookings and events recorded - also those from the terminals
connected - are stored there. The access/ time host system can retrieve this data repeatedly, if
required. In offline mode - when the host system cannot be reached - the master terminal takes over
part of the functions of the time/ access program. This usually does not affect the performance of the
terminal's/ master terminal's functionality.
Connections and Modes of Operation
Connection to the Higher-Ranking System
Master terminals are available with attachment to 10 MB Ethernet LAN (TCP/ IP data protocol)
Modes of Operation
Online mode
In this mode of operation, data is permanently exchanged between the master terminal and the
higher-ranking system. The time/ access program on the host system initiates the polling of the master
terminal. The master terminal acknowledges and responds to each polling either by a sign of life, a
status message or with booking data if bookings are carried out at the integrated card reader. The
time/ access program on the host computer evaluates the data and sends a positive or negative
booking response, e.g. account information back to the master terminal. From there, the response is
transferred to the booking site where it is also displayed. Time-controlled functions, such as the
activation of output relays, can be specified in the time recording/ access program. All booking data
and events entered at the master terminal.
Offline Mode
If data is not exchanged with the higher-ranking system, the master terminal switches to offline mode.
The master terminal then independently makes decisions by means of the parameterized conditions,
checks the card bookings. In the case of a positive decision, account information or a signal for
triggering the output relay is transmitted. In the case of a negative decision, the reason for the booking
rejection is transmitted. All the bookings recorded in offline mode are stored in the ring buffer of the
RAM with a special remark. The master terminal transmits this data during the next online operation
and marks it in the RAM as collected. The execution of time-controlled and automatic functions are
limited in offline mode. The mode is indicated on the display of the master terminal by the # sign..
Autonomous Mode
The function is similar to the offline mode, but the master terminal additionally tries to send booking
data and event data to the Host system as quickly as possible. The mode is indicated on the display
of the master terminal by the # sign..