KEBA FM265A控制器,FM265A使用說(shuō)明
同步和凍結(jié)是用于同步遠(yuǎn)程輸入/輸出站的全局控制功能。您可以使用這些功能使一組從機(jī)在系統(tǒng)中同時(shí)運(yùn)行。■ Sync命令用于控制從設(shè)備的輸出。當(dāng)從設(shè)備接收到同步信號(hào)時(shí)命令時(shí)，它保留來(lái)自主服務(wù)器的最后一個(gè)輸出數(shù)據(jù)，直到從服務(wù)器接收到另一個(gè)同步主人的命令?！?凍結(jié)用于控制從機(jī)的輸入。當(dāng)凍結(jié)命令發(fā)送到從設(shè)備時(shí)從設(shè)備凍結(jié)其當(dāng)前輸入，并且在接收到另一個(gè)輸入數(shù)據(jù)之前不接受任何新的輸入數(shù)據(jù)凍結(jié)命令。
KEBA FM265A控制器同步/凍結(jié)控件是可選的，長(zhǎng)度為兩個(gè)字節(jié)，默認(rèn)值是映射到%Q中的第一個(gè)可用地址。同步/凍結(jié)控制可以映射到任何PLC內(nèi)存區(qū)域，如果映射到離散PLC內(nèi)存，則其長(zhǎng)度必須為16位一個(gè)字（如果映射到字PLC內(nèi)存）（%AI、&AQ、%R）。要使用同步/凍結(jié)控件，需要指定組選擇和命令。注：Series 90-30 PROFIBUS Slave Module（IC693PBS201）不支持接收同步/凍結(jié)命令。同步/凍結(jié)控制字Bits名稱描述1–8（LSB）組選擇指定將此命令發(fā)送到哪個(gè)從屬組。每個(gè)從機(jī)可以在一個(gè)或多個(gè)組（0到7）中，這些組在從屬性對(duì)話框的參數(shù)選項(xiàng)卡。如果要向組ID為04的所有從機(jī)發(fā)送同步命令，則需要將0x04寫(xiě)入從字節(jié)1開(kāi)始的位置，將0x20寫(xiě)入從字節(jié)9開(kāi)始的字節(jié)位置要實(shí)際發(fā)送此命令，請(qǐng)切換命令的觸發(fā)位（字節(jié)16）。
Sync and Freeze are global control functions used to synchronize remote I/O stations. You can use
these functions to cause a group of slaves to operate at the same time in your system.
■ The Sync command is used to control a slave’s outputs. When a slave receives a Sync
command, it holds its last output data from the master until the slave receives another sync
command from the master.
■ Freeze is used to control a slave’s inputs. When a Freeze command is sent to a slave, the
slave freezes its current inputs and does not accept any new input data until it receives another
Freeze command.
The Sync/Freeze control is optional, two bytes in length, and the default is to map to the
first available address in %Q . The Sync/Freeze control can be mapped to any PLC
memory area and must have a length of either 16 bits if mapped to discrete PLC memory
(%Q, %I, %T, %M, %G) or, one word if mapped to Word PLC memory (%AI, &AQ, %R).
To use the Sync/Freeze control, you need to specify a Group Select and a command.
Note: The Series 90-30 PROFIBUS Slave Module (IC693PBS201) does not support
receipt of Sync/Freeze commands.
Sync/Freeze Control Word
Bits Name Description
1–8 (LSB) Group
Select
Specifies which group of slaves to send this command to. Each slave
can be in one or more groups (0 through 7), which are selected on
the Parameters tab of the slave Properties dialog box.If you wanted to send a SYNC command to all the slaves with group ID 04, you would
write 0x04 to the location starting at byte 1 and 0x20 to the byte location starting at byte 9.
To actually send this command, toggle the trigger bit of the command (byte 16).
