Technologies Computer Driver Instruction Manual
FS-8700-41 Simplex 4100 Driver Manual            Page 20 of 58 
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web:www.fieldserver.com 
Tel: (408) 262-2299 Fax: (408) 262-2296 Toll_Free: 888-509-1970  email: support@fieldserver.com 
Appendix A. Advanced Topics 
Appendix A.1.  Hardware Handshaking 
The driver does not support the Simplex RTS/CTS handshaking model.  Therefore deselect 
the HSHAKE terminal flag or connect CTS to RTS with a jumper on the 4100 side. 
Appendix A.2.  Simplex Address Formatting – Specific Keywords 
The  Simplex  Time  Recorder  Company  -  4100  Computer  Port  Protocol  only  uses  the 
standard 4100 address format of <Card>-<Point>-<Sub-point>.  Symbolic addressing is not 
supported.  The following table lists keywords which control the behavior of the FieldServer 
with respect to connection to a Simplex device and the permissible values determining the 
type of data being read/written. 
Keyword  Description  Function 
Ackall 
This command acknowledges all card-point-sub states 
based on the values found in the associated arrays. 
The FieldServer watches the Data Array to see if we need 
to send an ack. 
DA element
Accepted 
1
st
 – ack all   
2
nd
 - ack A  primary abnormal state
3
rd
 – ack F  Fire alarm 
4
th
 – ack P  Priority 2 
5
th
 – ack S  Supervisory 
6
th
 – ack T  Trouble 
7
th
 – ack C  Control 
Set the array element to 1 to initiate the command. The 
FieldServer clears the value on completion. 
WRBC 
Do not specify c-p-s in 
the Map Descriptor. 
Ack 
This command allows the user to acknowledge a single 
point. The specified Data Array is inspected and the value 
of the single element is used to determine which device 
state's are ack'd. Refer to Appendix A.4 
WRBC 
Specify c-p-s in the 
Map Descriptor. 
Clist 
This command returns the current point status for one 
point. Refer to Appendix A.4 and Appendix A.20 
RDBC 
Specify c-p-s in the 
Map Descriptor. 
Earths
4
This function obtains earth/ground status information from 
the panel. Two Data Array elements are used to store the 
normal (=1) or abnormal (=2) for each card. The first 
element is for the positive ground and the second element 
is the negative ground. Where cards do not report both, 
the first element of the pair is used. 
The array position is obtained by multiplying the card 
number by two and adding the offset specified in the Map 
Descriptor. Set the length of this Map Descriptor to twice 
the value of the maximum card number. 
RDBC 
Do not specify c-p-s in 
the Map Descriptor. 
4
 This driver function used the Simplex ‘CSHOW c-p-s CVAL’ command. It is only supported by panels 
with firmware revision numbers greater than 10 










