User manual

REFERENCES
143
5.2.5 Inter-Block Delay
For the PEN Emulation interface, data are sent to the Host in fixed size blocks of 20
characters each. The inter-block delay parameter allows setting a delay between each
block sent to the Host.
5.3 NETWORK PARAMETERS
5.3.1 Slave Address Range First/Last
These parameters define the valid addresses for the Slave cradles on the network.
Valid values are in the range 0 to 1999. However, the maximum number of cradles in
a single network is 16, (including the Master if present). All cradles in the system must
have different addresses.
To reduce system boot time, it is recommended to number the Slaves consecutively,
while it is not necessary that the Master cradle address is contained in the range. The
network addresses correspond to the radio addresses, see section 4.7.
At system power-up, the Master searches for and initializes all the Slaves found in the
valid address range. During this phase the yellow LED on the Master cradle blinks. The
time to complete the start up procedure varies depending on the complexity of the
network but is typically between a few seconds to a few minutes. Start up cannot be
interrupted. At the end of this procedure the system will be operative and can collect
data from all devices.
All Slaves must be powered up either before or together with the Master.
Slaves successively powered will not be recognized by the system even if
their address is in the specified range.
CAUTION
5.3.2 Network Warning Message
The Master cradle can transmit warning messages to the Host regarding some
network errors.
/*Slave xxxx not responding*/: when the Master can no longer
communicate with the specified Slave previously identified at start up.
/*Frame out of sequence for terminal xxxx*/: if a reader is sending data
packets out of sequence. This can happen if there are transmission problems
on the network (either connection or communication), or if the reader has
correctly transmitted data to a device not on the network (reader
configuration error).