Yokogawa Button Operated MV2000 - Manual (Page 114)

4-41
Commands
M-4662
1
2
3
4
5
6
7
App
Index
Description • The most recent measured/computed data
corresponds to the most recent measured/
computed data in the internal memory when
the MV receives the FD command.
• Set the first channel number and last channel
number parameters so that the last channel
number is greater than or equal to the first
channel number.
• Parameters p2 and p3 are valid when p1
is set to 0 or 1. All channels are specified if
parameters p2 and p3 are omitted.
• Set parameters p2 and p3 according to the
table in section 4.3.
FF Transmits FIFO data
Syntax FF p1,p2,p3,p4<terminator>
p1
Operation type
GET Transmit the next block
RESEND Retransmit the previous output
RESET Set the most recent data position
(block) to the read position of the
FIFO buffer (block)
p2 First channel number (measurement/
computation/external input channel)
p3 Last channel number (measurement/
computation/external input channel)
p4 Maximum number of blocks that are to be
loaded
1200
RD-MV1004/RD-MV2008/RD-
MV1008
240 RD-MV1006/RD-MV1012/RD-
MV1024/RD-MV2010/RD-MV2020/
RD-MV2030/RD-MV2040/RD-
MV2048
60 Models with the /MC1 external
input channel option
If the measured/computed/external input
data is less than the specified number of
blocks, the MV transmits the available data.
Example Transmit two blocks of FIFO data from channels
1 to 10.
FFGET,001,010,2
Description • The FIFO buffer is a cyclic buffer, which
overwrites the oldest data. Use the FR
command to set the acquisition period.
• The MV transmits the specified number of
blocks (p4), starting with the block after the
previously read block.
Make sure to read the data within the following
buffer period to prevent data dropouts.
• RD-MV1004
FIFO buffer size: 240 cycles (scan interval)
Maximum buffer period: 240 × (acquisition
interval). Resending is not
possible after the buffer
period elapses.
• Parameters p2 and p4 are valid when p1 is set
to GET.
• If p4 is omitted, the MV transmits all blocks.
• Set the first channel number and last channel
number parameters so that the last channel
number is greater than or equal to the first
channel number.
• For the output flow diagram of FIFO data, see
appendix 5.
• Set parameters p2 and p3 according to the
table in section 4.3.
FL Transmits a log, alarm summary,
or message summary
Syntax FL p1,p2<terminator>
p1
Log type
COM Communication
FTPC FTP client
ERR Operation error
LOGIN Login log
WEB Web operation
EMAIL E-mail
SNTP SNTP access log
DHCP DHCP access log
ALARM Alarm summary
MSG Message summary
MODBUS Modbus communication log
p2 Maximum read length of the log
1–200 Parameter p1 is COM or
MODBUS
1–1000 Parameter p1 is ALARM
1–450 Parameter p1 is MSG
1–50 Parameter p1 is some type
other than those above
Example Transmit the 10 most recent operation error logs.
FLERR,10
Description • Transmits the log that is stored in the MV.
• If p2 is omitted, the MV transmits all written
logs.
IS Transmits status information
Syntax IS p1<terminator>
p1
Status information output
0 Status information 1 to 4
1 Status information 1 to 8
Example Transmit status information 1 to 4.
IS0
Description The output status can be masked using the
status filter (IF command). For details on the
status information, see chapter 6.
FU Transmits the user level
Syntax FU p1<terminator>
p1
User information output
0 Information about the user
currently logged in
1 Information about the user logged
into a general-purpose service
Example Transmit information about the user logged into a
general-purpose service.
FU1
4.8 Output Commands (Setting/Measured/Computed Data Output)