Disable PoE port power output by SNMP

Hi, I have a PowerBox Pro PoE router, which is equipped with RouterOS.
I can telnet it to enable/disable a PoE port, in order to turn on/off PoE device connected remotely. Now I seek to do the same by means of SNMP, but I cannot find how to do it. I checked Microtik private mib, specifically, 1.3.6.1.4.1.14988.1.1.15, but there is no item to control it. I also checked Power-Ethernet-MIB (1.3.6.1.2.1.105), but looks like PowerBox Pro does not support it.
Appreciate if anyone could help.
Thanks.

Winbox → Interface → ether5 → DoubleClick → PoE Tab → PoE out set to off