Mitsubishi Electric MELSEC iQ-F Reference page 18

No. Variable name
(14) o_uReadData
■Public label
No. Variable name
(15) pbi_uRequestModuleIO
(16) pbi_uResendCountMax
(17) pbi_uMonitorTime
(18) pbo_uResendCount
(19) pbo_u4ErrTime
(20) pbo_u2ErrIP_Address
2 FX5 ETHERNET FB
16
2.5 M+FX5UCPU-EN_SLMP_DeviceRead_IP
Name Data type
Read data storage Word [Unsigned]/Bit
destination String [16-bit]
Name Data type
Requested module I/ Word [Unsigned]/Bit
O No. String [16-bit]
Maximum number of Word [Unsigned]/Bit
resends String [16-bit]
Arrival monitoring Word [Unsigned]/Bit
time String [16-bit]
Number of resends Word [Unsigned]/Bit
String [16-bit]
Error occurrence time Word [Unsigned]/Bit
String [16-bit](0..3)
Error-detected station Word [Unsigned]/Bit
IP address String [16-bit](0..1)
Default value Description
0 • When the 0th bit of the subcommand is 1, read the
device data in units of bits.
Example: When reading the bit device M100 to M107 in
units of bits
1st word
b15
0
M102
2nd word
b15
1
M106
Range Description
03FFH, 03E0H Specify the module of the access destination.
to 03E3H, • 03FFH: Own station, control CPU
03D0H to • 03E0H: Multiple CPU No.1
03D3H • 03E1H: Multiple CPU No.2
• 03E2H: Multiple CPU No.3
• 03E3H: Multiple CPU No.4
• 03D0H: To control system CPU
• 03D1H: To standby CPU
• 03D2H: To system A CPU
• 03D3H: To system B CPU
0 to 15 Specify the number of resends to be performed if the
data transfer is not completed within the monitoring
time specified by "arrival monitoring time".
• 0 to 15
0, 1 to 32767 Specify the monitoring time until completion of
processing. If the processing is not completed within
the monitoring time, data is resent until the value
specified in "maximum number of resends" is reached.
• 0: 10 s
• 1 to 32767: 1 to 32767 s

The number of resends performed (result) is stored.

Clock data at the time of error occurrence is stored.
1st word
• Upper 8 bits: Month (01H to 12H)
• Lower 8 bits: Lower 2 digits of year (00H to 99H)
2nd word
• Upper 8 bits: Hour (00H to 23H)
• Lower 8 bits: Day (01H to 31H)
3rd word
• Upper 8 bits: Second (00H to 59H)
• Lower 8 bits: Minute (00H to 59H)
4th word
• Upper 8 bits: Upper 2 digits of year (00H to 99H)
• Lower 8 bits: Day of week (00H (Sunday) to 06H
(Saturday))

The IP address of the station in which an error was
detected is stored. The third and fourth octets are
stored in the 1st word, and first and second octets are
stored in the 2nd word.
1st word
2nd word
b8 b7
1 0 0
M103 M100 M101
b8 b7
1 0 0
M107 M104 M105
b15 b8 b7
Third octet Fourth octet
First octet Second octet
b0
b0
b0