Transmission Delay Time; Safety Master Station Safety Remote I/O Station - Mitsubishi Electric MELSEC QS Series User Manual

5
DATA LINK PROCESSING TIME AND STATION
STATUS AT ERROR OCCURRENCE

5.2 Transmission Delay Time

This section explains the transmission delay time (the length of time before data
transmission is completed).
5.2.1 Safety master station
(1) Safety refresh monitoring time
5
- 3 5.2 Transmission Delay Time

5.2.1 Safety master station Safety remote I/O station

The safety refresh monitoring time is used to check that safety data link is normally
performed between the safety master station and safety remote stations. If a
response from a safety remote station is not received within the safety refresh
monitoring time, a safety monitoring timeout occurs, and safety I/O data turn OFF.
The safety refresh monitoring time is set as a network parameter.
The following shows how to calculate the safety refresh monitoring time.
The time can be calculated in different formulas, depending on the combination of the
versions of safety CPU module, safety master module, and safety remote I/O stations
to be used. For the combination of the versions other than below, refer to Appendix 2.
Safety CPU Safety master
module
10032 or higher 10032 or higher
For the safety refresh monitoring time that is used for calculating the maximum value
of safety response time, refer to the "Safety Application Guide".
[Calculation formula]
<Synchronous mode>
Safety refresh monitoring time
[ms]
*1
• SM :Sequence scan time of safety CPU module
• LS :Link scan time (Refer to Section 5.1.)
• n :(LS/SM) value that is rounded up to the nearest whole number
• m :{Safety refresh response processing time
rounded up to the nearest whole number
• :0 when LS
POINT
When the safety CPU module detects CC-LINK DATA RECEPTION TIMEOUT
(error code: 8320 to 8322), inclease the safety refresh monitoring time as needed.
Safety remote I/O station
Serial number (first five digits)
module
QS0J65BTS2-8D, QS0J65BTS2-4T QS0J65BTB2-12DT
10031 or higher
(SM n)
1.5ms, 1 when LS > 1.5ms.
Safety remote station
10032 or higher
3 + ((SM n) m) 2 + (SM
*2
/(SM n)} value that is
)