6F3B0253
102 T1-16S Users Manual
6. Programming Information

Timer/counter preset value (constant data) changing

The preset value (constant data) of timer or counter instruction can be changed in on-
line (during RUN) by using the programming tool.

Function instruction constant operand changing

The constant operand of function instruction can be changed in on-line (during RUN)
by using the programming tool.

Device changing

The device of contact or coil instruction can be changed in on-line (during RUN) by
using the programming tool.

On-line program changing

When the T1Ss memory mode is 4 k mode, the program can be changed using
normal edit mode. (rung by rung)
In the on-line program changing, it is not allowed to change the number or order of the
following instructions.
END, MCS, MCR, JCS, JCR, FOR, NEXT, CALL, SUBR, RET, IRET
The above on-line functions are performed on the RAM memory. Therefore,
when program has been changed, execute the EEPROM write operation
before turning off power. Otherwise, program stored in the EEPROM will be
overwritten.

On-line EEPROM write

The EEPROM write is possible in on-line (during RUN) as well as in HALT mode.
In the on-line EEPROM write, user data is not written into the EEPROM.
During this operation, the T1-16Ss scan time becomes longer. However, as it has the
time limit per scan, the T1-16Ss control operation is not stopped.
NOTE