Specifications

App6-30 Appendix 6 Universal Serial Communications
Global Port Number (FFH)
Active for connection mode (1 : n).
When the port number is set as [FFH] and a command is executed, all V series units that are
connected send a response in reply to a command from the host.
Commands for which global port number are active are shown below. If commands other than these
are used, a command error will occur.
Responses to global port numbers are not transmitted to the host. However, responses are written in
write area (n + 8) as shown below.
Signal Name Name Contents
WM Write Write data memory
WC Write CHR Write data memory as characters
Memory Contents Contents
0000H Global command not received
0100H ACK
Others Identical to NAK code (See page App6-41.)